init-repository does not populate qtquick3d/src/3rdparty/assimp/src

qtquick3d tools cause WebAssembly building fail:

em++ -s WASM=1 -s FULL_ES2=1 -s USE_WEBGL2=1 -s NO_EXIT_RUNTIME=0 -s ERROR_ON_UNDEFINED_SYMBOLS=1 --bind -O3 -s USE_PTHREADS=1 -s PTHREAD_POOL_SIZE=4 -s TOTAL_MEMORY=1GB C:/Qt/5.14.0/Src/qtbase/lib/libqtfreetype.a C:/Qt/5.14.0/Src/qtbase/lib/libqtlibpng.a -o C:\Qt\5.14.0\Src\qtbase\bin\balsam.js .obj\main.obj .obj\balsam.js_plugin_import.obj   C:/Qt/5.14.0/Src/qtbase/plugins/assetimporters/libassimp.a C:/Qt/5.14.0/Src/qtbase/plugins/assetimporters/libuip.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_debugger.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_inspector.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_local.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_messages.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_native.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_nativedebugger.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_preview.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_profiler.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_quickprofiler.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_server.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5PacketProtocol.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_tcp.a C:/Qt/5.14.0/Src/qtbase/plugins/platforms/libqwasm.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5EventDispatcherSupport.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5FontDatabaseSupport.a C:/Qt/5.14.0/Src/qtbase/lib/libqtfreetype.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5EglSupport.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqgif.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqicns.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqico.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqjpeg.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqtga.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqtiff.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqwbmp.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqwebp.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick3DAssetImport.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick3DRender.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5QmlModels.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Qml.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick3DUtils.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5OpenGLExtensions.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Gui.a C:/Qt/5.14.0/Src/qtbase/lib/libqtlibpng.a C:/Qt/5.14.0/Src/qtbase/lib/libqtharfbuzz.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Network.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Core.a C:/Qt/5.14.0/Src/qtbase/lib/libqtpcre2.a em++ -s WASM=1 -s FULL_ES2=1 -s USE_WEBGL2=1 -s NO_EXIT_RUNTIME=0 -s ERROR_ON_UNDEFINED_SYMBOLS=1 --bind -O3 -s USE_PTHREADS=1 -s PTHREAD_POOL_SIZE=4 -s TOTAL_MEMORY=1GB C:/Qt/5.14.0/Src/qtbase/lib/libqtfreetype.a C:/Qt/5.14.0/Src/qtbase/lib/libqtlibpng.a -o C:\Qt\5.14.0\Src\qtbase\bin\balsam.js .obj\main.obj .obj\balsam.js_plugin_import.obj   C:/Qt/5.14.0/Src/qtbase/plugins/assetimporters/libassimp.a C:/Qt/5.14.0/Src/qtbase/plugins/assetimporters/libuip.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_debugger.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_inspector.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_local.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_messages.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_native.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_nativedebugger.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_preview.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_profiler.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_quickprofiler.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_server.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5PacketProtocol.a C:/Qt/5.14.0/Src/qtbase/plugins/qmltooling/libqmldbg_tcp.a C:/Qt/5.14.0/Src/qtbase/plugins/platforms/libqwasm.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5EventDispatcherSupport.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5FontDatabaseSupport.a C:/Qt/5.14.0/Src/qtbase/lib/libqtfreetype.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5EglSupport.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqgif.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqicns.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqico.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqjpeg.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqtga.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqtiff.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqwbmp.a C:/Qt/5.14.0/Src/qtbase/plugins/imageformats/libqwebp.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick3DAssetImport.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick3DRender.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5QmlModels.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Qml.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Quick3DUtils.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5OpenGLExtensions.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Gui.a C:/Qt/5.14.0/Src/qtbase/lib/libqtlibpng.a C:/Qt/5.14.0/Src/qtbase/lib/libqtharfbuzz.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Network.a C:/Qt/5.14.0/Src/qtbase/lib/libQt5Core.a C:/Qt/5.14.0/Src/qtbase/lib/libqtpcre2.a mingw32-make[3]: Leaving directory 'C:/Qt/5.14.0/Src/qtquick3d/tools/meshdebug' mingw32-make[2]: *** [Makefile:73: sub-meshdebug-make_first] Error 2 mingw32-make[2]: *** Waiting for unfinished jobs.... mingw32-make[3]: Leaving directory 'C:/Qt/5.14.0/Src/qtquick3d/tools/balsam' mingw32-make[2]: Leaving directory 'C:/Qt/5.14.0/Src/qtquick3d/tools' mingw32-make[1]: *** [Makefile:75: sub-tools-make_first] Error 2 mingw32-make[1]: Leaving directory 'C:/Qt/5.14.0/Src/qtquick3d' mingw32-make: *** [Makefile:363: module-qtquick3d] Error 2

This is due to qtquick3d/src/3rdparty/assimp/src being empty.