Update to NSS_3_12_6_RC1 and NSPR_4_8_4_RTM.

nss/mozilla/nsprpub/pr/src/md/unix/unix.c

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
@@ skipping 2875 matching lines @@
 #endif /* HPUX && _PR_DCETHREADS */
 
     _pr_rename_lock = PR_NewLock();
     PR_ASSERT(NULL != _pr_rename_lock);
     _pr_Xfe_mon = PR_NewMonitor();
     PR_ASSERT(NULL != _pr_Xfe_mon);
 
     _PR_InitIOV();  /* one last hack */
 }
 
+void _PR_UnixCleanup(void)
+{
+    if (_pr_rename_lock) {
+        PR_DestroyLock(_pr_rename_lock);
+        _pr_rename_lock = NULL;
+    }
+    if (_pr_Xfe_mon) {
+        PR_DestroyMonitor(_pr_Xfe_mon);
+        _pr_Xfe_mon = NULL;
+    }
+}
+
 #if !defined(_PR_PTHREADS)
 
 /*
  * Variables used by the GC code, initialized in _MD_InitSegs().
  */
 static PRInt32 _pr_zero_fd = -1;
 static PRLock *_pr_md_lock = NULL;
 
 /*
  * _MD_InitSegs --
@@ skipping 829 matching lines @@
                 rv++;
             }
         }
         PR_ASSERT(rv > 0);
     }
     PR_ASSERT(-1 != timeout || rv != 0);
 
     return rv;
 }
 #endif /* _PR_NEED_FAKE_POLL */