Log Message:
Changes 3.3.1:
* Fixed a problem in the “multiple -arch options” support introduced \ 
in 3.3. When using the direct mode (the default), different combinations of \ 
-arch options were not detected properly.
* Fixed an issue when compiler option -Wp,-MT,path is used instead of -MT path \ 
(and similar for -MF, -MP and -MQ) and run_second_cpp (CCACHE_CPP2) is enabled.