Reviewed by Darin Adler.

        Update .gitattributes for WebKitTools -> Tools change
        https://bugs.webkit.org/show_bug.cgi?id=51365

        * .gitattributes: WebKitTools -> Tools rename. Removed no longer existing file references.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@74378 268f45cc-cd09-0410-ab3c-d52691b4dbfc