Don't link with OpenGL framework unconditionally under Mac OS X.

"-framework OpenGL" is already added when wxUSE_OPENGL is true, there is no
need to always include it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76799 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Don't link with QuickTime framework unnecessarily under OS X.

Only use QuickTime when wxUSE_MEDIACTRL is true.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76800 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775