Update NSPR to 4.12 and NSS to 3.23 on iOS

nss/lib/freebl/mpi/mpprime.c

 /*
  *  mpprime.c
  *
  *  Utilities for finding and working with prime and pseudo-prime
  *  integers
  *
  * 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/. */
 
@@ skipping 279 matching lines @@
 
   MP_CHECKOK( mp_init_size(&x, MP_USED(a)) );
   MP_CHECKOK( mp_init(&z) );
   MP_CHECKOK( mp_init(&m) );
   MP_CHECKOK( mp_div_2d(&amo, b, &m, 0) );
 
   /* Do the test nt times... */
   for(iter = 0; iter < nt; iter++) {
 
     /* Choose a random value for 1 < x < a      */
-    s_mp_pad(&x, USED(a));
+    MP_CHECKOK( s_mp_pad(&x, USED(a)) );
     mpp_random(&x);
     MP_CHECKOK( mp_mod(&x, a, &x) );
     if(mp_cmp_d(&x, 1) <= 0) {
       iter--;    /* don't count this iteration */
       continue;  /* choose a new x */
     }
 
     /* Compute z = (x ** m) mod a               */
     MP_CHECKOK( mp_exptmod(&x, &m, a, &z) );
     
@@ skipping 264 matching lines @@
   }
 
   return MP_NO;
 
 } /* end s_mpp_divp() */
 
 /* }}} */
 
 /*------------------------------------------------------------------------*/
 /* HERE THERE BE DRAGONS                                                  */