qmake: Separated platform-specific parts into config_*.pri
To clarify config.pri, the platform-specific configuration was moved to their own .pri files.
Also, clearing up Mac config with three distinct options: native SDK with qmake default settings (not for distribution), 10.6+ 64-bit Intel, and 10.4+ 32-bit Intel/PPC.
qmake: Separated platform-specific parts into config_*.pri
To clarify config.pri, the platform-specific configuration was moved
to their own .pri files.
Also, clearing up Mac config with three distinct options: native SDK
with qmake default settings (not for distribution), 10.6+ 64-bit Intel, and
10.4+ 32-bit Intel/PPC.