MIPS: Enable big endian testing.

test/unittests/unittests.gyp

Index: test/unittests/unittests.gyp
diff --git a/test/unittests/unittests.gyp b/test/unittests/unittests.gyp
index 1f0497d99ec4effc90dd5ae495e876977f6367f8..926ec5c863606056c731281350ef79ae51338b3c 100644
--- a/test/unittests/unittests.gyp
+++ b/test/unittests/unittests.gyp
@@ -139,11 +139,21 @@
             'compiler/ia32/instruction-selector-ia32-unittest.cc',
           ],
         }],
+        ['v8_target_arch=="mips"', {
+          'sources': [  ### gcmole(arch:mips) ###
+            'compiler/mips/instruction-selector-mips-unittest.cc',
+          ],
+        }],
         ['v8_target_arch=="mipsel"', {
           'sources': [  ### gcmole(arch:mipsel) ###
             'compiler/mips/instruction-selector-mips-unittest.cc',
           ],
         }],
+        ['v8_target_arch=="mips64"', {
+          'sources': [  ### gcmole(arch:mips64) ###
+            'compiler/mips64/instruction-selector-mips64-unittest.cc',
+          ],
+        }],
         ['v8_target_arch=="mips64el"', {
           'sources': [  ### gcmole(arch:mips64el) ###
             'compiler/mips64/instruction-selector-mips64-unittest.cc',