Fix trivial test-webkitpy regression introduced by http://trac.webkit.org/changeset/148075.

Unreviewed.

* Scripts/webkitpy/layout_tests/run_webkit_tests_integrationtest.py:
(RunTest.test_build_check):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148077 268f45cc-cd09-0410-ab3c-d52691b4dbfc