Changelog: add entry for HEVC support.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
hevc: Search start code in decode_nal_units().

User may cut off a weird position and send a packet from there.
This avoids returning as invalid data immediately.
hevc_parser: Set pict_type, key_frame and output_picture_number.

Conflicts:
	libavcodec/hevc.c
Merge commit 'afa93d198aaf2cc661c4df6d4095cd030265d30a'

* commit 'afa93d198aaf2cc661c4df6d4095cd030265d30a':
  hevc_parser: Set pict_type, key_frame and output_picture_number.
  hevc: Search start code in decode_nal_units().

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