Hardcoded Android NDK paths in Qt for Android from Qt installer.

With current Qt 5.13.0 for Android + Qt Automotive extensions from installer I have problem building companion app for neptune3-ui.

Current setup:

1. Ubuntu 16.04 Mate
   Qt from installed installed in ${HOME}/QtQt/
   Android SDK and NDK installed in:
   ${HOME}/android-sdk-linux/ and ${HOME}/android-ndk-r19-beta2/ respectively.
   NDK worked with 5.12 branch.
2. Set environments variables:
   ANDROID_HOME=${HOME}/android-sdk-linux/
   ANDROID_NDK_ROOT=${HOME}/android-ndk-r19-beta2
3. Got latest neptune3-ui source and checked out 5.13 branch.
4. Created build1 and install subdirectories in the source directory
5. switched into build1
6. ran:

~/QtQt/5.13.0/android_armv7/bin/qmake ../settings_app_android.pro -spec android-clang
make qmake_all

that part succeeded.

1. ran:

   make -j $(nproc) 
   

   that failed with:

   rm -f libdrivedata_backend_qtro.so
   /home/nzamotaev/android-ndk-r19-beta2/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++ -D__ANDROID_API__=21 -target armv7-none-linux-androideabi -gcc-toolchain /home/nzamotaev/android-ndk-r19-beta2/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -Wl,--exclude-libs,libunwind.a --sysroot=/home/nzamotaev/android-ndk-r19-beta2/platforms/android-21/arch-arm/ -Wl,-rpath=\$ORIGIN/../lib -Wl,-rpath=/home/nzamotaev/QtQt/5.13.0/android_armv7/lib -Wl,--no-undefined -Wl,-z,noexecstack -shared -Wl,-soname,libdrivedata_backend_qtro.so -o libdrivedata_backend_qtro.so instrumentclusterbackend.o drivedataplugin.o moc_instrumentclusterbackend.o moc_drivedataplugin.o moc_rep_pagingmodel_replica.o moc_rep_instrumentcluster_replica.o  -L/home/nzamotaev/Projects/neptune3-ui/build1/lib -ldrivedata /home/nzamotaev/QtQt/5.13.0/android_armv7/lib/libQt5Gui.so -L/opt/android/android-ndk-r19c/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a /home/nzamotaev/QtQt/5.13.0/android_armv7/lib/libQt5IviRemoteObjectsHelper.a /opt/android/android-ndk-r19c/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++.so.21 -llog -lz -lm -ldl -lc /home/nzamotaev/QtQt/5.13.0/android_armv7/lib/libQt5IviCore.so /home/nzamotaev/QtQt/5.13.0/android_armv7/lib/libQt5Qml.so /home/nzamotaev/QtQt/5.13.0/android_armv7/lib/libQt5RemoteObjects.so /home/nzamotaev/QtQt/5.13.0/android_armv7/lib/libQt5Network.so /home/nzamotaev/QtQt/5.13.0/android_armv7/lib/libQt5Core.so -lGLESv2  -L/home/nzamotaev/android-ndk-r19-beta2/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a /home/nzamotaev/android-ndk-r19-beta2/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++.so.21 -llog -lz -lm -ldl -lc
   clang++: error: no such file or directory: '/opt/android/android-ndk-r19c/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++.so.21'
   Makefile:83: recipe for target '../../../plugins/qtivi/libdrivedata_backend_qtro.so' failed
   make[1]: *** [../../../plugins/qtivi/libdrivedata_backend_qtro.so] Error 1
   make[1]: Leaving directory '/home/nzamotaev/Projects/neptune3-ui/build1/src/drivedata/backend'
   Makefile:95: recipe for target 'sub-src-drivedata-backend-backend-pro-make_first-ordered' failed
   make: *** [sub-src-drivedata-backend-backend-pro-make_first-ordered] Error 2
   

   As seen in this log - it tries to link to a library in non-existent location /opt/android/android-ndk-r19c
   Making it a symlink to ${HOME}/android-ndk-r19-beta2 fixes this situation. But this is totally broken behavior.  Also - it worked before 5.13.

This hardcode is everywhere:

nzamotaev@nzamotaev0:~/QtQt/5.13.0/android_armv7$ pwd
/home/nzamotaev/QtQt/5.13.0/android_armv7
nzamotaev@nzamotaev0:~/QtQt/5.13.0/android_armv7$ grep "android-ndk-r19c" -R .|wc -l
184

If needed - I can give the list of files.
But they are .prl and  .la