Stub out Skia AVX and HSW opts.

skia/ext/SkOpts_hsw_stub.cc

Index: skia/ext/SkOpts_hsw_stub.cc
diff --git a/skia/ext/SkOpts_hsw_stub.cc b/skia/ext/SkOpts_hsw_stub.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8f48a1fcf84b9250f9560cf533447b49c87e85b2
--- /dev/null
+++ b/skia/ext/SkOpts_hsw_stub.cc
@@ -0,0 +1,11 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This is SkOpts_hsw.cpp, stubbed out to do nothing.
+
+namespace SkOpts {
+    void Init_hsw();
+    void Init_hsw() {}
+}
+