This ensures that the Xcode 'Display name' input under
${target} -> General -> Identity -> Display name is not empty.
Because adding ${PRODUCT_NAME} directly in the Info.plist.in template
will cause CMake to evaluate it as variable expansion, work around the
issue by putting the dollar sign into a separate cache variable that
after evaluation will result in ${PRODUCT_NAME} being in the file
verbatim, so that Xcode evaluate it at build time.
Amends 4d838dae5a821e9e5f013ba1d5a494ece1b5180e
Pick-to: 6.2 6.3
Task-number: QTBUG-95838
Change-Id: I2d1090cc8e84b32442f7daca2d4ce5e3ad413c68
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>