CMP0047: Fix CMAKE_COMPILER_IS_GNU(CC|CXX) in OLD behavior

The implementation of CMP0047 detects the QNX compiler id internally,
then changes it to GNU after the language is fully enabled.  This is too
late to correctly set the old IS_GNU variables, so set them as part of
the policy OLD behavior.

Reported-by: Mike Lattanzio <mlattanzio@blackberry.com>
BundleUtilities: Allow Info.plist files which use CR line endings

Convert \r to our internal end-of-line character just as we do \n.

Signed-off-by: Tim Blechmann <tim@klingt.org>
Merge branch 'fix-Qt-Autogen' into release
Merge branch 'backport-fix-CMP0047-IS_GNU-vars' into release
Merge branch 'backport-BundleUtilities-os9-newlines' into release
Merge branch 'release'