Merge changes I2a54927e,I2fb7a01a

* changes:
  Remove i686-linux-android gcc-4.7 bins, libs, and includes
  add OWNERS for prebuilts/gcc/darwin-x86/x86/i686-linux-android-4.7
tree: afcbb319fc0f9bcca4e023ecb568fd0cf13095ea
  1. OWNERS