upload.py has a raw_input() that keeps on throwing crap, try to trap it as much as possible.

Otherwise I get useless stack traces and the user too.

R=dpranke@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/6794020

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@80338 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/git_cl.py b/git_cl.py
index 1887cbb..d24bf73 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -984,6 +984,8 @@
 
   try:
     issue, patchset = upload.RealMain(['upload'] + upload_args + args)
+  except KeyboardInterrupt:
+    sys.exit(1)
   except:
     # If we got an exception after the user typed a description for their
     # change, back up the description before re-raising.