Remove unused macros for msa.

Remove unused macros for msa.

Signed vectors are rarely used in libyuv... remove macros for now.
Remove word shuffler, use byte shuffler in row_msa.
Bump version number.

TBR=manojkumar.bhosale@imgtec.com
BUG=libyuv:634
Committed: https://chromium.googlesource.com/libyuv/libyuv/+/51a3500c1894387e94d81f193de571475d57d6d0

[fbarchard1, 2016-09-26 23:49:23]

guard has wrong name.

git cl lint
include/libyuv/macros_msa.h:11:  #ifndef header guard has wrong style, please
use: INCLUDE_LIBYUV_MACROS_MSA_H_  [build/header_guard] [5]
include/libyuv/macros_msa.h:75:  #endif line should be "#endif  //
INCLUDE_LIBYUV_MACROS_MSA_H_"  [build/header_guard] [5]
include/libyuv/macros_msa.h:18:  Using C-style cast.  Use
reinterpret_cast<RTYPE*>(...) instead  [readability/casting] [4]
include/libyuv/macros_msa.h:21:  Using C-style cast.  Use
reinterpret_cast<RTYPE*>(...) instead  [readability/casting] [4]

In other headers, there is NOLINT

#ifndef INCLUDE_LIBYUV_ROW_H_  // NOLINT

but thats due to lint previously being incorrect about name.  Looks like NOLINT
can be removed from all headers.
But will make msa match other headers in this CL

[fbarchard1, 2016-09-27 00:00:53]

trybots fails

gyp: name 'mips_msa' is not defined while evaluating condition '(target_arch ==
"mipsel" or target_arch == "mips64el")       and (mips_msa == 1)' in libyuv.gyp
Error: Command '/usr/bin/python src/gyp_libyuv' returned non-zero exit status 1
in /b/build/slave/android_mips/build
step returned non-zero exit code: 2

will need to update to newer chromium for testing.

[fbarchard1, 2016-09-27 00:35:00]

Description was changed from

==========
Remove unused macros for msa.

Signed vectors are rarely used in libyuv... remove macros for now.
Remove word shuffler, use byte shuffler in row_msa.
Bump version number.

TBR=manojkumar.bhosale@imgtec.com
BUG=libyuv:634
==========

to

==========
Remove unused macros for msa.

Signed vectors are rarely used in libyuv... remove macros for now.
Remove word shuffler, use byte shuffler in row_msa.
Bump version number.

TBR=manojkumar.bhosale@imgtec.com
BUG=libyuv:634

Committed:
https://chromium.googlesource.com/libyuv/libyuv/+/51a3500c1894387e94d81f193de...
==========

[fbarchard1, 2016-09-27 00:35:02]

Committed patchset #2 (id:20001) manually as
51a3500c1894387e94d81f193de571475d57d6d0 (presubmit successful).