improper include style in qtmultimedia confuses syncqt when shadow-building

git clone https://code.qt.io/qt/qt5.git Qt5
cd Qt5
perl init-repository
cd ..
set "QTSRC=%CD%\Qt5"

md "Qt5-build/android-armv7-4.9"
cd "Qt5-build/android-armv7-4.9"

call "%QTSRC%\configure.bat"^
  -opensource^
  -confirm-license^
  -prefix "C:/Dev/Tools/Qt-libs"^
  -platform win32-g++^
  -make-tool mingw32-make^
  -xplatform android-g++^
  -debug-and-release^
  -no-warnings-are-errors^
  -android-ndk-platform android-9^
  -android-arch armeabi-v7a^
  -android-toolchain-version 4.9^
  -opengl es2^
  -nomake examples^
  -nomake tests^
  -no-incredibuild-xge

mingw32-make

cd qtmultimediaquicktools/ && ( test -e Makefile || C:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/bin/qmake.exe C:/Dev/Projects/Qt5/qtmultimedia/src/qtmultimediaquicktools/qtmultimediaquicktools.pro -o Makefile ) && C:/Dev/Tools/Msys2/mingw32/bin/mingw32-make -f Makefile
mingw32-make[3]: Entering directory 'C:/Dev/Projects/Qt5-build/android-armv7-4.9/qtmultimedia/src/qtmultimediaquicktools'
C:/Dev/Tools/Android/ndk64-r11b/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-g++ -c -Wno-psabi -march=armv7-a -mfloat-abi=softfp -mfpu=vfp -ffunction-sections -funwind-tables -fstack-protector -fno-short-enums -DANDROID -Wa,--noexecstack -fno-builtin-memmove -std=c++11 -O2 -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -mthumb -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -Wno-psabi -W -D_REENTRANT -fPIC -DQT_NO_XKBCOMMON -DQT_BUILD_QTMULTIMEDIAQUICKTOOLS_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_QUICK_LIB -DQT_MULTIMEDIA_LIB -DQT_GUI_LIB -DQT_QML_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -IC:/Dev/Projects/Qt5/qtmultimedia/src/qtmultimediaquicktools -I. -IC:/Dev/Projects/Qt5/qtmultimedia/src/multimedia/qtmultimediaquicktools_headers -I../../include -I../../include/QtMultimediaQuick_p -I../../include/QtMultimediaQuick_p/5.6.1 -I../../include/QtMultimediaQuick_p/5.6.1/QtMultimediaQuick_p -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtdeclarative/include -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtdeclarative/include/QtQuick -I../../include/QtMultimedia/5.6.1 -I../../include/QtMultimedia/5.6.1/QtMultimedia -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include/QtGui/5.6.1 -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include/QtGui/5.6.1/QtGui -I../../include/QtMultimedia -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include/QtGui -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtdeclarative/include/QtQml -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include/QtNetwork -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include/QtCore/5.6.1 -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include/QtCore/5.6.1/QtCore -IC:/Dev/Projects/Qt5-build/android-armv7-4.9/qtbase/include/QtCore -I.moc -isystem C:/Dev/Tools/Android/ndk64-r11b/sources/cxx-stl/gnu-libstdc++/4.9/include -isystem C:/Dev/Tools/Android/ndk64-r11b/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a/include -isystem C:/Dev/Tools/Android/ndk64-r11b/platforms/android-9/arch-arm/usr/include -IC:/Dev/Projects/Qt5/qtbase/mkspecs/android-g++ -o .obj/qdeclarativevideooutput.obj C:/Dev/Projects/Qt5/qtmultimedia/src/qtmultimediaquicktools/qdeclarativevideooutput.cpp
In file included from C:/Dev/Projects/Qt5/qtmultimedia/src/qtmultimediaquicktools/qdeclarativevideooutput_render_p.h:49:0,
                 from C:/Dev/Projects/Qt5/qtmultimedia/src/qtmultimediaquicktools/qdeclarativevideooutput.cpp:36:
../../include/QtMultimedia/5.6.1/QtMultimedia/private/qdeclarativevideooutput_backend_p.h:1:134: fatal error: ../../../../../../../../Qt5/qtmultimedia/src/multimedia/qtmultimediaquicktools_headers/qdeclarativevideooutput_backend_p.h: No such file or directory
 #include "../../../../../../../../Qt5/qtmultimedia/src/multimedia/qtmultimediaquicktools_headers/qdeclarativevideooutput_backend_p.h"
                                                                                                                                      ^
compilation terminated.
Makefile:2016: recipe for target '.obj/qdeclarativevideooutput.obj' failed
mingw32-make[3]: *** [.obj/qdeclarativevideooutput.obj] Error 1
mingw32-make[3]: Leaving directory 'C:/Dev/Projects/Qt5-build/android-armv7-4.9/qtmultimedia/src/qtmultimediaquicktools'