For modules that are not yet ported to CMake and that use
QMAKE_USE += libfoo
we need to provide the information about libfoo in the qt_lib_XXX.pri
files.
Also, we now generate qt_ext_XXX.pri files for bundled 3rdparty libs.
Task-number: QTBUG-75666
Change-Id: I9e4b057a197554ecb37c294c0bf09e2a2b3aa053
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
