Update NSS to 3.21 RTM and NSPR to 4.11 RTM

nspr/pr/src/pthreads/ptthread.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/. */
 
 /*
 ** File:            ptthread.c
 ** Descritpion:        Implemenation for threds using pthreds
 ** Exports:            ptthread.h
 */
@@ skipping 662 matching lines @@
 }  /* PR_GetThreadState */
 
 PR_IMPLEMENT(PRThreadPriority) PR_GetThreadPriority(const PRThread *thred)
 {
     PR_ASSERT(thred != NULL);
     return thred->priority;
 }  /* PR_GetThreadPriority */
 
 PR_IMPLEMENT(void) PR_SetThreadPriority(PRThread *thred, PRThreadPriority newPri)
 {
-    PRIntn rv = -1;
+    PRIntn rv;
 
     PR_ASSERT(NULL != thred);
 
     if ((PRIntn)PR_PRIORITY_FIRST > (PRIntn)newPri)
         newPri = PR_PRIORITY_FIRST;
     else if ((PRIntn)PR_PRIORITY_LAST < (PRIntn)newPri)
         newPri = PR_PRIORITY_LAST;
 
 #if defined(_PR_DCETHREADS)
     rv = pthread_setprio(thred->id, pt_PriorityMap(newPri));
@@ skipping 35 matching lines @@
         if (rv == -1)
         {
             /* We don't set pt_schedpriv to EPERM in case errno == EPERM
              * because adjusting the nice value might be permitted for certain
              * ranges but not for others. */
             PR_LOG(_pr_thread_lm, PR_LOG_MIN,
                 ("PR_SetThreadPriority: setpriority failed with error %d",
                  errno));
         }
     }
+#else
+    (void)rv; /* rv is unused */
 #endif
 
     thred->priority = newPri;
 }  /* PR_SetThreadPriority */
 
 PR_IMPLEMENT(PRStatus) PR_Interrupt(PRThread *thred)
 {
     /*
     ** If the target thread indicates that it's waiting,
     ** find the condition and broadcast to it. Broadcast
@@ skipping 1056 matching lines @@
 PR_IMPLEMENT(const char *) PR_GetThreadName(const PRThread *thread)
 {
     if (!thread)
         return NULL;
     return thread->name;
 }
 
 #endif  /* defined(_PR_PTHREADS) || defined(_PR_DCETHREADS) */
 
 /* ptthread.c */