pkgconfig: rename the pkgconfig name to libyami_codecparser
tests: build error
v4l2dec: fixes for seek

- seek releaseCodecLock at start and clear it after done
- enqued buffers in v4l2 wrapper are required to flush (deque by client)
  during seek
tests: check avcodec version in DecodeInputAvFormat
       vp9 codec id only enabled in recently avcodec version
testscripts: Move MD5 files to video content.
tests: add vaSyncSurface for '-m -1'

- fps becomes stable after adding vaSyncSurface()
- optimize file input to read more data each time
tests: calculate gross/net fps

- gross fps count initialization time
- net fps is calculated after the first 5 frames