Merge changes Ib4bfae24,I5dc6ae01

* changes:
  Remove i686-linux-android gcc-4.6 bins, libs, and includes
  add OWNERS for prebuilts/gcc/darwin-x86/x86/i686-linux-android-4.6
tree: afcbb319fc0f9bcca4e023ecb568fd0cf13095ea
  1. OWNERS