kva: support ZOOM

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
Allow hev1 as a fourcc for HEVC
avcodec: Fix memory leak in EncodeVideo

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>
libgcrypt: update to version 1.6.1

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>