crypto: add go:build lines (ethereum#23468)

Author: gzliudan

crypto/blake2b/blake2bAVX2_amd64.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.7 && amd64 && !gccgo && !appengine
 // +build go1.7,amd64,!gccgo,!appengine
 
 package blake2b

crypto/blake2b/blake2b_amd64.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.7 && amd64 && !gccgo && !appengine
 // +build !go1.7,amd64,!gccgo,!appengine
 
 package blake2b

crypto/blake2b/blake2b_f_fuzz.go

@@ -1,4 +1,6 @@
-// +build gofuzz
+// Only enable fuzzer on platforms with AVX enabled
+//go:build go1.7 && amd64 && !gccgo && !appengine
+// +build go1.7,amd64,!gccgo,!appengine
 
 package blake2b
 

crypto/blake2b/blake2b_ref.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !amd64 || appengine || gccgo
 // +build !amd64 appengine gccgo
 
 package blake2b

crypto/blake2b/register.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.9
 // +build go1.9
 
 package blake2b

crypto/bn256/bn256_fast.go

@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
+//go:build amd64 || arm64
 // +build amd64 arm64
 
 // Package bn256 implements the Optimal Ate pairing over a 256-bit Barreto-Naehrig curve.
@@ -22,6 +23,7 @@ package bn256
 import (
 	bn256cf "github.com/XinFinOrg/XDPoSChain/crypto/bn256/cloudflare"
 )
+
 // G1 is an abstract cyclic group. The zero value is suitable for use as the
 // output of an operation, but cannot be used as an input.
 type G1 = bn256cf.G1

crypto/bn256/cloudflare/gfp_generic.go

@@ -1,3 +1,4 @@
+//go:build (!amd64 && !arm64) || generic
 // +build !amd64,!arm64 generic
 
 package bn256