Update NSPR to 4.12 and NSS to 3.23 on iOS

nss/lib/pk11wrap/debug_module.c

 /* 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 "prlog.h"
 #include <stdio.h>
 #include "cert.h"  /* for CERT_DerNameToAscii & CERT_Hexify */
 
 static PRLogModuleInfo *modlog = NULL;
 
 static CK_FUNCTION_LIST_PTR module_functions;
@@ skipping 2667 matching lines @@
 static void print_final_statistics(void)
 {
     int total_calls = 0;
     PRIntervalTime total_time = 0;
     PRUint32 pr_total_time;
     char *type;
     char *fname;
     FILE *outfile = NULL;
     int i;
 
-    fname = PR_GetEnv("NSS_OUTPUT_FILE");
+    fname = PR_GetEnvSecure("NSS_OUTPUT_FILE");
     if (fname) {
         /* need to add an optional process id to the filename */
         outfile = fopen(fname,"w+");
     }
     if (!outfile) {
         outfile = stdout;
     }
         
 
     fprintf(outfile,"%-25s %10s %12s %12s %10s\n", "Function", "# Calls", 
@@ skipping 29 matching lines @@
     fprintf(outfile,"%25s %10d %10d%2s\n", "Totals", total_calls, 
                                                         pr_total_time, type);
     fprintf(outfile,"\n\nMaximum number of concurrent open sessions: %d\n\n",
                                                          maxOpenSessions);
     fflush (outfile);
     if (outfile != stdout) {
         fclose(outfile);
     }
 }