Implemented a build system that generates offset header files for ARM assembly files, in Android.

The original CL was separated into two. Please refer to https://webrtc-codereview.appspot.com/860005 on how the build system and python script being used.
Review URL: https://webrtc-codereview.appspot.com/754005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3059 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed