Update third_party/nss to NSS 3.15.4.

nss/lib/util/secdig.h

 /*
  * crypto.h - public data structures and prototypes for the crypto library
  *
  * 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 _SECDIG_H_
 #define _SECDIG_H_
 
@@ skipping 22 matching lines @@
 **      "sig" the raw signature data (from MD2 or MD5)
 **      "sigLen" the length of the signature data
 **
 ** NOTE: this is a low level routine used to prepare some data for PKCS#1
 ** digital signature formatting.
 **
 ** XXX It might be nice to combine the create and encode functions.
 ** I think that is all anybody ever wants to do anyway.
 */
 extern SGNDigestInfo *SGN_CreateDigestInfo(SECOidTag algorithm,
-                                           unsigned char *sig,
+                                           const unsigned char *sig,
                                            unsigned int sigLen);
 
 /*
 ** Destroy a digest-info object
 */
 extern void SGN_DestroyDigestInfo(SGNDigestInfo *info);
 
 /*
 ** Encode a digest-info object
 **      "poolp" is where to allocate the result from; it can be NULL in
@@ skipping 40 matching lines @@
 /*
 ** Compare two digest-info objects, returning the difference between
 ** them.
 */
 extern SECComparison SGN_CompareDigestInfo(SGNDigestInfo *a, SGNDigestInfo *b);
 
 
 SEC_END_PROTOS
 
 #endif /* _SECDIG_H_ */