Auto-detect hevc in mpeg-ts.

Fixes decoding of files without PMT/PAT.

Signed-off-by: Carl Eugen Hoyos <cehoyos@ag.or.at>
Merge remote-tracking branch 'cehoyos/master'

* cehoyos/master:
  Auto-detect hevc in mpeg-ts.

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