roll libyuv from r1579 to r1607

roll libyuv for GN fix to chromium internal settings, enabling more warnings
and consistant with gyp build options.

Add ARGBExtractAlpha function.
Fix YUV bilinear filter improved filter accuracy; uses 128-f instead of 127-f.
unittest fixes for Arm scaler - use J420 for J422 pointing to same row,
improving performance and accuracy.
Fix ios jpeg build error.
Fix BlendPlaneRow_SSSE3 impossible constraints on android full debug
Fix unittests to avoid private row.h header.
Fix vector_size(32) build error on yuv conversion for intel on gcc 4.4.

BUG=libyuv:572,chromium:592745,libyuv:575,libyuv:579,libyuv:573,libyuv:583,chromium:601140,libyuv:582,libyuv:581,chromium:601140,libyuv:578,libyuv:581,libyuv:580,libyuv:586,libyuv:590,webrtc:5006,libyuv:593,libyuv:592,libyuv:594,libyuv:595,libyuv:597,libyuv:599,libyuv:598,libyuv:600,libyuv:602,libyuv:605,libyuv:610,libyuv:612, libyuv:618, libyuv:620, webrtc:6091, webrtc:6094, libyuv:616, libyuv:623
TEST=try bots
R=rsesek@chromium.org

Review-Url: https://codereview.chromium.org/2126333002
Cr-Commit-Position: refs/heads/master@{#405512}

DEPS

@@ -223,7 +223,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/open-source-parsers/jsoncpp.git' + '@' + 'f572e8e42e22cfcf5ab0aea26574f408943edfa4', # from svn 248
 
   'src/third_party/libyuv':
-    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '76aee8ced7ca74c724d69c1dcf9891348450c8e8',
+    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '46a8eaaf0c760d9243de8d83bf920b161ba858d5',
 
   'src/third_party/smhasher/src':
     Var('chromium_git') + '/external/smhasher.git' + '@' + 'e87738e57558e0ec472b2fc3a643b838e5b6e88f',