Update NSPR to 4.12 and NSS to 3.23 on iOS

nspr/pr/include/prinit.h

 /* -*- 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/. */
 
 #ifndef prinit_h___
 #define prinit_h___
 
 #include "prthread.h"
 #include "prtypes.h"
@@ skipping 13 matching lines @@
 #define PR_NAME     "NSPR"
 
 /*
 ** NSPR's version is used to determine the likelihood that the version you
 ** used to build your component is anywhere close to being compatible with
 ** what is in the underlying library.
 **
 ** The format of the version string is
 **     "<major version>.<minor version>[.<patch level>] [<Beta>]"
 */
-#define PR_VERSION  "4.11"
+#define PR_VERSION  "4.12"
 #define PR_VMAJOR   4
-#define PR_VMINOR   11
+#define PR_VMINOR   12
 #define PR_VPATCH   0
 #define PR_BETA     PR_FALSE
 
 /*
 ** PRVersionCheck
 **
 ** The basic signature of the function that is called to provide version
 ** checking. The result will be a boolean that indicates the likelihood
 ** that the underling library will perform as the caller expects.
 **
@@ skipping 159 matching lines @@
 NSPR_API(PRStatus) PR_CallOnceWithArg(
     PRCallOnceType      *once,
     PRCallOnceWithArgFN  func,
     void                *arg
 );
 
 
 PR_END_EXTERN_C
 
 #endif /* prinit_h___ */