Land https://codereview.chromium.org/889083003/ to update libsrtp to upstream 1.5.0

srtp/crypto/include/crypto_kernel.h

 /*
  * crypto_kernel.h
  *
  * header for the cryptographic kernel
  *
  * David A. McGrew
  * Cisco Systems, Inc.
  */
 /*
  *      
@@ skipping 203 matching lines @@
  * key_len octets.  Return values are:
  * 
  *    err_status_ok           no problems
  *    err_status_alloc_fail   an allocation failure occured
  *    err_status_fail         couldn't find cipher with identifier 'id'
  */
 
 err_status_t
 crypto_kernel_alloc_cipher(cipher_type_id_t id, 
                            cipher_pointer_t *cp, 
-                           int key_len);
+                           int key_len,
+                           int tag_len);
 
 /*
  * crypto_kernel_alloc_auth(id, ap, key_len, tag_len); 
  *
  * allocates an auth function of type id at location *ap, with key
  * length key_len octets and output tag length of tag_len.  Return
  * values are:
  * 
  *    err_status_ok           no problems
  *    err_status_alloc_fail   an allocation failure occured
@@ skipping 36 matching lines @@
  *     - [other]          a problem occured, and no assumptions should
  *                        be made about the contents of the destination
  *                        buffer.
  *
  * @ingroup SRTP
  */
 err_status_t
 crypto_get_random(unsigned char *buffer, unsigned int length);
      
 #endif /* CRYPTO_KERNEL */