Update NSPR to 4.12 and NSS to 3.23 on iOS

nss/lib/freebl/rsa.c

Index: nss/lib/freebl/rsa.c
diff --git a/nss/lib/freebl/rsa.c b/nss/lib/freebl/rsa.c
index f1824eff9ad51e19817493ea6fab04c7319cb8a5..48b557b42178cadd7a5694c1e35610244115c86e 100644
--- a/nss/lib/freebl/rsa.c
+++ b/nss/lib/freebl/rsa.c
@@ -747,8 +747,7 @@ RSA_PopulatePrivateKey(RSAPrivateKey *key)
     }
     /* if we have the modulus and one prime, calculate the second. */
     if ((prime_count == 1) && (hasModulus)) {
-	mp_div(&n,&p,&q,&r);
-	if (mp_cmp_z(&r) != 0) {
+	if (mp_div(&n,&p,&q,&r) != MP_OKAY || mp_cmp_z(&r) != 0) {
 	   /* p is not a factor or n, fail */
 	   err = MP_BADARG;
 	   goto cleanup;
@@ -1096,9 +1095,7 @@ init_blinding_params(RSABlindingParams *rsabp, RSAPrivateKey *key,
     rsabp->free = bp;
 
     /* List elements are keyed using the modulus */
-    SECITEM_CopyItem(NULL, &rsabp->modulus, &key->modulus);
-
-    return SECSuccess;
+    return SECITEM_CopyItem(NULL, &rsabp->modulus, &key->modulus);
 }
 
 static SECStatus