Update NSPR to 4.12 and NSS to 3.23 on iOS

nspr/pr/src/pthreads/ptio.c

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* 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:   ptio.c
 ** Descritpion:  Implemenation of I/O methods for pthreads
 */
 
@@ skipping 3747 matching lines @@
 
 static PRInt32 _pr_poll_with_poll(
     PRPollDesc *pds, PRIntn npds, PRIntervalTime timeout)
 {
     PRInt32 ready = 0;
     /*
      * For restarting poll() if it is interrupted by a signal.
      * We use these variables to figure out how much time has
      * elapsed and how much of the timeout still remains.
      */
-    PRIntervalTime start, elapsed, remaining;
+    PRIntervalTime start = 0, elapsed, remaining;
 
     if (pt_TestAbort()) return -1;
 
     if (0 == npds) PR_Sleep(timeout);
     else
     {
 #define STACK_POLL_DESC_COUNT 64
         struct pollfd stack_syspoll[STACK_POLL_DESC_COUNT];
         struct pollfd *syspoll;
         PRIntn index, msecs;
@@ skipping 233 matching lines @@
  */
 static PRInt32 _pr_poll_with_select(
     PRPollDesc *pds, PRIntn npds, PRIntervalTime timeout)
 {
     PRInt32 ready = 0;
     /*
      * For restarting select() if it is interrupted by a signal.
      * We use these variables to figure out how much time has
      * elapsed and how much of the timeout still remains.
      */
-    PRIntervalTime start, elapsed, remaining;
+    PRIntervalTime start = 0, elapsed, remaining;
 
     if (pt_TestAbort()) return -1;
 
     if (0 == npds) PR_Sleep(timeout);
     else
     {
 #define STACK_POLL_DESC_COUNT 64
         int stack_selectfd[STACK_POLL_DESC_COUNT];
         int *selectfd;
                 fd_set rd, wr, ex, *rdp = NULL, *wrp = NULL, *exp = NULL;
@@ skipping 879 matching lines @@
 {
     fd_set rd, wr, ex;
     struct timeval tv, *tvp;
     PRInt32 max, max_fd;
     PRInt32 rv;
     /*
      * For restarting select() if it is interrupted by a Unix signal.
      * We use these variables to figure out how much time has elapsed
      * and how much of the timeout still remains.
      */
-    PRIntervalTime start, elapsed, remaining;
+    PRIntervalTime start = 0, elapsed, remaining;
 
     static PRBool unwarned = PR_TRUE;
     if (unwarned) unwarned = _PR_Obsolete( "PR_Select", "PR_Poll");
 
     FD_ZERO(&rd);
     FD_ZERO(&wr);
     FD_ZERO(&ex);
 
     max_fd = _PR_getset(pr_rd, &rd);
     max_fd = (max = _PR_getset(pr_wr, &wr))>max_fd?max:max_fd;
@@ skipping 70 matching lines @@
 
 PR_IMPLEMENT(PRStatus) PR_GetFileInfo64UTF16(const PRUnichar *fn, PRFileInfo64 *info)
 {
     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
     return PR_FAILURE;
 }
 /* ================ UTF16 Interfaces ================================ */
 #endif /* MOZ_UNICODE */
 
 /* ptio.c */