Set global flags and arm optimizations

Change-Id: I7d60837113a09eede84c8e7bb1bbf174893b8b8d
use mcpu

Change-Id: If83a5018df1deb8d323e09b4e9fe439a6da6d830
Remove cm.deps

Change-Id: I39e31101209ccb6101a65dc2d37bc19fcd619c5f