cups-helper: split on newlines in cups helper

We want to split on both spaces and newlines, not just
spaces, for the case when cups-config does have proper output.

Speculative fix for the bug, untested on a system it affects.

BUG=92772

Review URL: http://codereview.chromium.org/7647025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96811 0039d316-1c4b-4281-b951-d872f2087c98

printing/cups_config_helper.py

@@ -32,7 +32,7 @@ def run_cups_config(mode):
     flags = cups.communicate()[0].strip()
 
     flags_subset = []
-    for flag in flags.split(' '):
+    for flag in flags.split():
         flag_mode = None
         if flag.startswith('-l'):
             flag_mode = '--libs'