androiddepployqt calls qmlimportscanner to find qml modules.
Due to an issue in a generator expression, CMake did not write out the
android default qml output directory to the deployment json file,
which in turn means that qmlimportscanner did not get that
information.
When the scanner scanned the sources, it found some relative imports
but couldn't find relevant qmldir files because they were in an
android-specific directory.
This caused warnings like 'qmldir file not found at /some/path'
repeatedly.
Fix the generator expression to use $<COMMA> instead of , so that the
genex condition is evaluated successfully and the extra qml import
paths are passed along to qmlimportscanner.
Amends 76665f2a72
Pick-to: 6.4
Fixes: QTBUG-102595
Change-Id: Ia74c3c80f12d05b0a9cd0978df1a58bb5582198a
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
81b5395aef