exclude *hsw* source files on Android/iOS G3 build.

Like *sse2*, *avx*, etc, these are x86-specific and
even there must be compiled with particular flags.

Change-Id: Ibbc004b9ba5da6da70449177423a785d2c644846
Reviewed-on: https://skia-review.googlesource.com/7623
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
diff --git a/public.bzl b/public.bzl
index 14d0c53..38c0143 100644
--- a/public.bzl
+++ b/public.bzl
@@ -213,6 +213,7 @@
         "src/opts/*SSE4*",
         "src/opts/*sse4*",
         "src/opts/*avx*",
+        "src/opts/*hsw*",
         "src/opts/*x86*",
         "src/opts/SkBlitMask_opts_none.cpp",
         "src/opts/SkBlitRow_opts_none.cpp",
@@ -264,6 +265,7 @@
         "src/opts/*SSE4*",
         "src/opts/*sse4*",
         "src/opts/*avx*",
+        "src/opts/*hsw*",
         "src/opts/*x86*",
         "src/opts/SkBlitMask_opts_arm*.cpp",
         "src/opts/SkBlitRow_opts_arm*.cpp",