Update NSPR to 4.12 and NSS to 3.23 on iOS

nspr/pr/src/md/windows/w95thred.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 <process.h>  /* for _beginthreadex() */
 
 #if defined(_MSC_VER) && _MSC_VER <= 1200
 /*
@@ skipping 47 matching lines @@
     if (thread->flags & (_PR_PRIMORDIAL | _PR_ATTACHED)) {
         /*
         ** Warning:
         ** --------
         ** NSPR requires a real handle to every thread.
         ** GetCurrentThread() returns a pseudo-handle which
         ** is not suitable for some thread operations (e.g.,
         ** suspending).  Therefore, get a real handle from
         ** the pseudo handle via DuplicateHandle(...)
         */
-        DuplicateHandle(
+        BOOL ok = DuplicateHandle(
                 GetCurrentProcess(),     /* Process of source handle */
                 GetCurrentThread(),      /* Pseudo Handle to dup */
                 GetCurrentProcess(),     /* Process of handle */
                 &(thread->md.handle),    /* resulting handle */
                 0L,                      /* access flags */
                 FALSE,                   /* Inheritable */
                 DUPLICATE_SAME_ACCESS);  /* Options */
+        if (!ok) {
+            return PR_FAILURE;
+        }
+        thread->id = GetCurrentThreadId();
+        thread->md.id = thread->id;
     }
 
     /* Create the blocking IO semaphore */
     thread->md.blocked_sema = CreateSemaphore(NULL, 0, 1, NULL);
     if (thread->md.blocked_sema == NULL)
         return PR_FAILURE;
         else
                 return PR_SUCCESS;
 }
 
@@ skipping 342 matching lines @@
 
 #pragma data_seg(".CRT$XLB")
 PIMAGE_TLS_CALLBACK p_thread_callback_nspr = PR_OnThreadExit;
 
 // Reset the default section.
 #pragma data_seg()
 
 #endif  // _WIN64
 
 #endif  // NSPR_STATIC