Unreviewed, fix Apple Win build following http://trac.webkit.org/changeset/138838
https://bugs.webkit.org/show_bug.cgi?id=105927

* WebCore.vcproj/WebCoreTestSupport.vcproj:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138864 268f45cc-cd09-0410-ab3c-d52691b4dbfc