The qt_internal_apply_gc_binaries function should apply both compile
and link flags, not just link flags.
The flags should be applied publically to all consumers of Bootstrap
regardless if the gc_binaries feature is enabled.
The flags should be applied publically to Core only in case if the
feature is enabled (aka for static builds only).
Change-Id: Id42af0d9b527004d74c04eff2c9e3c2be1e76aac
Fixes: QTBUG-84461
Task-number: QTBUG-83929
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
a08bf7f00a