Update NSS to 3.21 RTM and NSPR to 4.11 RTM

nspr/pr/src/io/prmwait.c

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "primpl.h"
 #include "pprmwait.h"
 
 #define _MW_REHASH_MAX 11
 
@@ skipping 457 matching lines @@
             {
                 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
                 PR_Lock(group->ml);
                 goto failed_alloc;
             }
             if (NULL != old_polling_list)
                 PR_DELETE(old_polling_list);
             PR_Lock(group->ml);
             if (_prmw_running != group->state)
             {
+                PR_DELETE(poll_list);
                 PR_SetError(PR_INVALID_STATE_ERROR, 0);
                 goto aborted;
             }
             group->polling_list = poll_list;
             group->polling_count = new_count;
         }
 
         now = PR_IntervalNow();
         polling_interval = max_polling_interval;
         since_last_poll = now - group->last_poll;
@@ skipping 959 matching lines @@
 #endif
 
     return result;  /* what we live for */
 
 bad_argument:
     PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
     return NULL;  /* probably ambiguous */
 }  /* PR_EnumerateWaitGroup */
 
 /* prmwait.c */