GYP changes for arm64 linux build

third_party/libwebp/libwebp.gyp

Index: third_party/libwebp/libwebp.gyp
diff --git a/third_party/libwebp/libwebp.gyp b/third_party/libwebp/libwebp.gyp
index 7174c1fbf6490d78958a9a04c39273be3dfc615f..14bc2f67e82f9de9ebf1d5549787b304a88c7749 100644
--- a/third_party/libwebp/libwebp.gyp
+++ b/third_party/libwebp/libwebp.gyp
@@ -181,8 +181,9 @@
               'cflags!': [ '-mfpu=vfpv3-d16' ],
               'cflags': [ '-mfpu=neon' ],
             }],
-            ['target_arch == "arm64"', {
+            ['target_arch == "arm64" and not (OS == "linux" and clang == 1)', {

[Nico, 2016/06/02 17:57:24]

I think you can just add `and clang!=1` here. You don't need a new comment
either: The existing comment already says this works around a gcc bug, it makes
sense that clang doesn't have gcc bugs :-)

[apatole, 2016/06/03 06:11:47]

OK, will do.

[apatole, 2016/06/03 11:33:44]

Done.

               # avoid an ICE with gcc-4.9: b/15574841
+              # Disable it for clang build of linux arm64 as it fails with error - unsupported flag.
               'cflags': [ '-frename-registers' ],
             }],
           ]