Fix test runner imports.

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/526273003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23597 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/testrunner/local/testsuite.py

@@ -29,6 +29,7 @@
 import imp
 import os
 
+from . import commands
 from . import statusfile
 from . import utils