Merge commit '9affa784a0743b95bde135b5acfce2183afc35d8'

* commit '9affa784a0743b95bde135b5acfce2183afc35d8':
  vp9 encoder: use a decent default speed setting

Conflicts:
	libavcodec/libvpxenc.c

See: 34e32d6464135a03da14d5b0aef1d42796939eae
Merged-by: Michael Niedermayer <michaelni@gmx.at>