Initial commit
New ffmpeg compile (without x264 and opencore-amr).
Compile with opencore-amr.
Compile with x264.
Clean configuration files.

- Support armv5te and arm7a
- Delete unnecesary options in ffmpeg configuration.
- Delete some logs
Call configure-make-all.sh from Android.mk
Refactor configure scripts.
Move configure scripts from external dir to jni dir.
Update .gitignore within new directories tree.
Update putAudioSamplesRx method call with new nFrame parameter.
Add control times and logs to improve audio-rx (dirty)
Show errors correctly in audio-rx and video-rx.
Usage QUEUE_SIZE+1 pFrames and buffers in video-rx.
Refactor and clean unnecessary logs in video-rx.
Alloc jintArray with picture_nbytes/4 length.

Each jint size is 4 bytes, so we must use
jint arrays of picture_nbytes/4 length.
This reduce the time needed to alloc and
management of jintArrays.
Export timespecDiff function to utils.c.
Refactor variables declaration in video-rx.
Add media/utils.c in LOCAL_SRC_FILES in Android.mk.
Use sizeof(jint) instead of JINT_SIZE.
Initiate jintArrays and pFrameRGBs to NULL.

This ensure ReleaseStringUTFChars and av_free functions
not fail.