[MIPS] Add support to gyp files to build Native Client inside of Chromium

src/trusted/validator/x86/decoder/ncval_x86_decoder.gyp

Index: src/trusted/validator/x86/decoder/ncval_x86_decoder.gyp
diff --git a/src/trusted/validator/x86/decoder/ncval_x86_decoder.gyp b/src/trusted/validator/x86/decoder/ncval_x86_decoder.gyp
index 92e70c1dc72f5bc563905e070f960b42b798be8d..fddf8fcd2f643067738a86d154a1ca4819ba9731 100644
--- a/src/trusted/validator/x86/decoder/ncval_x86_decoder.gyp
+++ b/src/trusted/validator/x86/decoder/ncval_x86_decoder.gyp
@@ -177,5 +177,8 @@
     [ 'target_arch=="arm"', {
       'targets': []
     }],
+    [ 'target_arch=="mipsel"', {
+      'targets': []
+    }],
   ],
 }