libvpx

Merge changes from topic 'fix-vp9-bitstream-test'

* changes:
  vp9_encoder_parms_get_to_decoder: cosmetics
  vp9...parms_get_to_decoder: remove unneeded func
  vp9...parms_get_to_decoder: fix EXPECT param order
  vp9_encoder_parms_get_to_decoder: delete dead code
  fix BitstreamParms test
  vp9_encoder_parms_get_to_decoder: remove vp10
  yuvconfig2image(): add explicit cast to avoid conv warning
  vp9/10 decoder_init: add missing alloc cast
  vp9/10: set color_space on preview frame
  vp10: add extern "C" to headers
  vp9: add extern "C" to headers