add HEVC(H.265) decoder. plz sync:
1. git@github.com:omxcodec/android_external_ffmpeg (branch:cm_maguro-10.1)
2. https://github.com/omxcodec/android_frameworks_native.git (branch:cm_maguro-10.1)
3. https://github.com/omxcodec/android_frameworks_av.git (branch:cm_maguro-10.1)

How to test hevc decoder:
1. get test media files
wget http://ftp.kw.bbc.co.uk/hevc/hm-10.0-anchors/bitstreams/i_main/BQMall_832x480_60_qp22.bin and push it to /sdcard/Movies/hevc/
2. set prop because hevc decoder is very show
adb shell setprop sys.media.vdec.drop 0
3. play raw hevc file
adb shell am start -a android.intent.action.VIEW -d file:///mnt/sdcard/Movies/hevc/BQMall_832x480_60_qp22.bin -t video/*
update README
Merge branch 'jb-x86' of https://github.com/omxcodec/stagefright-plugins into jb-x86

Conflicts:
	libstagefright/FFmpegExtractor/FFmpegExtractor.cpp