Add support for MIPS to android build

R=borenet@google.com, scroggo@google.com

Author: djsollen@google.com

Review URL: https://codereview.chromium.org/109323004

git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@12592 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/opts.gyp b/opts.gyp
index d260220..bd072cb 100644
--- a/opts.gyp
+++ b/opts.gyp
@@ -97,7 +97,7 @@
             }],
           ],
         }],
-        [ '(skia_arch_type == "arm" and arm_version < 7) or (skia_os == "ios")', {
+        [ '(skia_arch_type == "mips") or (skia_arch_type == "arm" and arm_version < 7) or (skia_os == "ios")', {
           'sources': [
             '../src/opts/SkBitmapProcState_opts_none.cpp',
             '../src/opts/SkBlitMask_opts_none.cpp',