[MIPS] Added MIPS DSPr2 optimization for BGRAConvolve2D routine

skia/skia.gyp

Index: skia/skia.gyp
diff --git a/skia/skia.gyp b/skia/skia.gyp
index 63ab0699bc5236def3777d4ffe906c4cdb57b295..1b644bedb060a6e77567ecda868aed4f0dbd46fa 100644
--- a/skia/skia.gyp
+++ b/skia/skia.gyp
@@ -740,6 +740,7 @@
             '../third_party/skia/src/opts/SkBitmapProcState_opts_none.cpp',
             '../third_party/skia/src/opts/SkBlitRow_opts_none.cpp',
             '../third_party/skia/src/opts/SkUtils_opts_none.cpp',
+            'ext/convolver_mips_dspr2.cc',
           ],
         }],
       ],
@@ -783,7 +784,7 @@
             ],
           },
         }],
-        [ 'target_arch != "arm"', {
+        [ 'target_arch != "arm" and target_arch !="mipsel"', {
           'sources': [
             '../third_party/skia/src/opts/SkBitmapProcState_opts_SSSE3.cpp',
           ],