[MIPS] Add support in media.gyp for building on MIPS architecture.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 0d23796dc2568fb53894542ab8f092ce14316637..5d60aa22e76a1bbcc59cec4c8b3b3561f14ce91f 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -804,9 +804,9 @@
                 'yuv_convert_simd_x86',
               ],
             }],
-            [ 'target_arch == "arm"', {
+            [ 'target_arch == "arm" or target_arch == "mipsel"', {
               'dependencies': [
-                'yuv_convert_simd_arm',
+                'yuv_convert_simd_c',
               ],
             }],
           ],
@@ -929,7 +929,7 @@
           ],
         },
         {
-          'target_name': 'yuv_convert_simd_arm',
+          'target_name': 'yuv_convert_simd_c',
           'type': 'static_library',
           'include_dirs': [
             '..',
@@ -1064,7 +1064,7 @@
         },
       ],
     }],
-    ['OS == "linux" and target_arch != "arm"', {
+    ['OS == "linux" and target_arch != "arm" and target_arch != "mipsel"', {
       'targets': [
         {
           'target_name': 'tile_render_bench',