Bug 1180745 - Fix logging test screenshotting errors. r=jgriffin

build/automationutils.py

@@ -308,6 +308,6 @@ def dumpScreen(utilityPath):
     returncode = subprocess.call(utility + [imgfilename])
     printstatus(returncode, utilityname)
   except OSError, err:
-    log.info("Failed to start %s for screenshot: %s" %
+    log.info("Failed to start %s for screenshot: %s"
-             utility[0], err.strerror)
+             % (utility[0], err.strerror))
     return