id3v2enc: use a case-insensitive comparison for APIC picture type
webpdec: Fix decoding of the huffman group indices.

Per the specification, "The red and green components of a pixel
define the meta Huffman code used in a particular block of the ARGB
image."
x86: mpegvideoenc: Change SIMD optimization name suffixes to lowercase
Merge commit '9279826008b80daad7446950a821f32033ccd33f'

* commit '9279826008b80daad7446950a821f32033ccd33f':
  id3v2enc: use a case-insensitive comparison for APIC picture type

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c6698dfe7cdbc7634f33245875488ed3fa4a8ced'

* commit 'c6698dfe7cdbc7634f33245875488ed3fa4a8ced':
  webpdec: Fix decoding of the huffman group indices.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '391ecc961ced2bde7aecb3053ac35191f838fae8'

* commit '391ecc961ced2bde7aecb3053ac35191f838fae8':
  x86: mpegvideoenc: Change SIMD optimization name suffixes to lowercase

Conflicts:
	libavcodec/x86/mpegvideoenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
swr: initialize only the necessary resample dsp functions

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
x86/swr: split audioconvert and rematrix DSP into separate files

Also rename resample_x86_dsp.c to resample_init.c

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>