gclient: Keyboard interrupt should not cause request to send stack

Patch-contributed-by: Alexey Marinichev <amarinichev@chromium.org>

Review URL: http://codereview.chromium.org/553139

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@37434 0039d316-1c4b-4281-b951-d872f2087c98

breakpad.py

@@ -34,7 +34,7 @@ def SendStack(stack, url='http://chromium-status.appspot.com/breakpad'):
 
 def CheckForException():
   last_tb = getattr(sys, 'last_traceback', None)
-  if last_tb:
+  if last_tb and sys.last_type is not KeyboardInterrupt:
     SendStack(''.join(traceback.format_tb(last_tb)))