Update dependencies pre release

vendor/golang.org/x/crypto/poly1305/sum_amd64.go

@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64,!gccgo,!appengine,go1.7
+// +build amd64,!gccgo,!appengine
 
 package poly1305
 
-// This function is implemented in sum_amd64.s
+// This function is implemented in poly1305_amd64.s
+
 //go:noescape
+
 func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]byte)
 
 // Sum generates an authenticator for m using a one-time key and puts the