remove linux.cc and simplify cpuid
TEST=pulse build of talk against libyuv
BUG=none
Review URL: http://webrtc-codereview.appspot.com/224002

git-svn-id: http://libyuv.googlecode.com/svn/trunk@25 16f28f9a-4ce2-e073-06de-1de4eb20be90
8 files changed