Merge pull request #1 from Nitrillo/android_x86

WebRTC lib amalgamation. Added x86 architecture.
Remove depot tools, checkout at build time
Bail on error plz
Add build revision to output properites file
Add jobs tag, clean build directory so we don't have to clean everything every time
allow ninja clean to fail; this might have been an unnecessary call anyway
wtf emacs
TIL bash and sh handle subshells differently.
Clean up fat lib objects from previous builds.

Trying to move away from full checkouts of webrtc every build.
Added missing includes from libjingle.
Added some flags to enable libjingle compiling.
Added resulting jar files to tar bundle.