CQ: catch more exceptions when applying a patch

commit-queue/pending_manager.py

Index: commit-queue/pending_manager.py
===================================================================
--- commit-queue/pending_manager.py	(revision 235478)
+++ commit-queue/pending_manager.py	(working copy)
@@ -23,6 +23,7 @@
 import checkout
 import git_cl
 import patch
+import ssl
 import subprocess2
 
 import errors
@@ -90,7 +91,7 @@
       if e.stdout:
         out += '\n%s' % e.stdout
       raise base.DiscardPending(self, out)
-    except urllib2.HTTPError as e:
+    except (ssl.SSLError, urllib2.HTTPError, urllib2.URLError) as e:
       raise base.DiscardPending(
           self,
           ('Failed to request the patch to try. Please note that binary files '