Update NSPR to 4.12 and NSS to 3.23 on iOS

nss/lib/softoken/pkcs11i.h

 /* 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/. */
 /*
  * Internal data structures and functions used by pkcs11.c
  */
 #ifndef _PKCS11I_H_
 #define _PKCS11I_H_ 1
 
 #include "nssilock.h"
@@ skipping 383 matching lines @@
     void                *hashContext;
     SFTKBegin           begin;
     SFTKHash            update;
     SFTKEnd             end;
     CK_ULONG            macSize;
     int                 padSize;
     unsigned char       key[MAX_KEY_LEN];
     unsigned int        keySize;
 };
 
-/* SFTKChaCha20Poly1305Info saves the key, tag length, nonce, and additional
- * data for a ChaCha20+Poly1305 AEAD operation. */
+/* SFTKChaCha20Poly1305Info saves the key, tag length, nonce,
+ * and additional data for a ChaCha20+Poly1305 AEAD operation. */
 struct SFTKChaCha20Poly1305InfoStr {
     ChaCha20Poly1305Context freeblCtx;
-    unsigned char nonce[8];
+    unsigned char nonce[12];
     unsigned char ad[16];
     unsigned char *adOverflow;
     unsigned int adLen;
 };
 
 /*
  * Template based on SECItems, suitable for passing as arrays
  */
 struct SFTKItemTemplateStr {
     CK_ATTRIBUTE_TYPE   type;
@@ skipping 330 matching lines @@
 extern CK_RV
 sftk_TLSPRFInit(SFTKSessionContext *context, 
                   SFTKObject *        key, 
                   CK_KEY_TYPE         key_type,
                   HASH_HashType       hash_alg,
                   unsigned int        out_len);
 
 SEC_END_PROTOS
 
 #endif /* _PKCS11I_H_ */