[VS Addin] Fix typo in test code for parallel builds.

BUG=https://code.google.com/p/chromium/issues/detail?id=174685

Review URL: https://codereview.chromium.org/12207169

git-svn-id: https://nativeclient-sdk.googlecode.com/svn/trunk/src@1506 050acbb0-2703-11df-ab0a-9f3f633ae91d
1 file changed