Bug 941478: Need x86/i686-linux-android-4.7 to build emulator-x86-jb. r=vicamo

Change-Id: I3fc4dce397d07ecbf05fb33e50be8a68f614d1bc
use local aosp mirror

Change-Id: I9d43700cff3b1678830adf8c2906748424f17138