[NaCl SDK] Don't include gtest/gmock in library form

native_client_sdk/src/tests/sdk_util_test/example.dsc

 {
   'TOOLS': ['clang-newlib', 'glibc', 'pnacl', 'linux', 'mac'],
   'SEL_LDR': True,
 
   'TARGETS': [
     {
       'NAME' : 'sdk_util_test',
       'TYPE' : 'main',
       'SOURCES' : [
         'main.cc',
         'string_util_test.cc',
       ],
       'DEPS': ['ppapi_simple_cpp', 'sdk_util', 'nacl_io'],
-      'LIBS': ['ppapi_simple_cpp', 'ppapi_cpp', 'gmock', 'nacl_io', 'ppapi', 'gtest', 'pthread'],
+      'LIBS': ['ppapi_simple_cpp', 'ppapi_cpp', 'nacl_io', 'ppapi', 'pthread'],
+      'INCLUDES': [
+        '../../src/gtest/include',
+        '../../src/gtest',
+        '../../src/gmock/include',
+        '../../src/gmock'
+      ],
+      'EXTRA_SOURCES' : [
+        '../../src/gtest/src/gtest-all.cc',
+        '../../src/gmock/src/gmock-all.cc'
+      ],
       'CXXFLAGS': ['-Wno-sign-compare']
     }
   ],
   'DATA': [
     'example.js'
   ],
   'DEST': 'tests',
   'NAME': 'sdk_util_test',
   'TITLE': 'SDK Util test',
 }