Fix msvs_guid for gmock and re-add gmock_unittest into base_unittest.

The issue is that if there are lower case characters in the msvs_guid,
incredibuild will silently ignore the target during a _command-line_ build.

This issue does not affect builds in visual studio (incredibuild-based, or
regular), but it does break the build bots.

Review URL: http://codereview.chromium.org/118013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17267 0039d316-1c4b-4281-b951-d872f2087c98

testing/gmock.gyp

@@ -10,7 +10,7 @@
     {
       'target_name': 'gmock',
       'type': '<(library)',
-      'msvs_guid': 'F9D886ED-B09F-4b74-932F-D8E4691E6B7F',
+      'msvs_guid': 'F9D886ED-B09F-4B74-932F-D8E4691E6B7F',
       'dependencies': [
         'gtest.gyp:gtest',
       ],