avformat: utils: K&R formatting cosmetics

Also adjust some comment wording / spelling and reorder header #includes.
x86inc: Speed up assembling with Yasm

Work around Yasm's inefficiency with handling large numbers of variables
in the global scope.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
Merge commit '50ecf15712354a1d5b3f4dc9a57ff90ed7ee9654'

* commit '50ecf15712354a1d5b3f4dc9a57ff90ed7ee9654':
  avformat: utils: K&R formatting cosmetics

Conflicts:
	libavformat/utils.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'b7d0d10a1d54073501b728dbe166a32e2b7b26f1'

* commit 'b7d0d10a1d54073501b728dbe166a32e2b7b26f1':
  x86inc: Speed up assembling with Yasm

See: 4d55fe7204382a75cc4817aeb272257005d442e8
Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/huffyuv: update years in copyright

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/huffyuv: support gbrp9/10/12/14

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>