Enable / Disable modules

- Enable libjpeg build
- Disable peerconnection as it refers to internal libjingle (may enable it again in the future)
- Disable audio aec and video content_analysis sse2 version
- Disable X11 related flag
- Disable vp8 as there's no way to support it by software
- Disable unnecessary tests build as no gflags and X11 (video renderer).

Change-Id: Ie25b2da8b1c33c67a32b4f8d104b2922b652731e
10 files changed