Changelog: add WebP muxer

Suggested-by: jamrial
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavf/mux: Always call write_trailer() from av_write_trailer() to avoid a leak.

Fixes ticket #4049.
avutil/arm/float_dsp_init_vfp: replace restrict by av_restrict

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'cehoyos/master'

* cehoyos/master:
  lavf/mux: Always call write_trailer() from av_write_trailer() to avoid a leak.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
configure: Prevent icl being incorrectly detected as msvc.

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

Reviewed-by: Benoit Fouet <benoit.fouet@free.fr>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'upstream/master'