vendorize deps for snappy, blake2b and sha256 (#3476)

Bring in new optimization and portability changes.

Fixes https://github.com/minio/minio-go/issues/578

cmd/fs-v1-multipart.go

@@ -18,7 +18,6 @@ package cmd
 
 import (
 	"crypto/md5"
-	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
 	"hash"
@@ -26,6 +25,8 @@ import (
 	"path"
 	"strings"
 	"time"
+
+	"github.com/minio/sha256-simd"
 )
 
 // listMultipartUploads - lists all multipart uploads.

cmd/fs-v1.go

@@ -18,7 +18,6 @@ package cmd
 
 import (
 	"crypto/md5"
-	"crypto/sha256"
 	"encoding/hex"
 	"errors"
 	"fmt"
@@ -29,6 +28,7 @@ import (
 	"strings"
 
 	"github.com/minio/minio/pkg/mimedb"
+	"github.com/minio/sha256-simd"
 )
 
 // fsObjects - Implements fs object layer.

cmd/hasher.go

@@ -18,9 +18,10 @@ package cmd
 
 import (
 	"crypto/md5"
-	"crypto/sha256"
 	"encoding/base64"
 	"encoding/hex"
+
+	"github.com/minio/sha256-simd"
 )
 
 // getSHA256Hash returns SHA-256 hash of given data.

cmd/xl-v1-multipart.go

@@ -18,7 +18,6 @@ package cmd
 
 import (
 	"crypto/md5"
-	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
 	"hash"
@@ -29,6 +28,7 @@ import (
 	"time"
 
 	"github.com/minio/minio/pkg/mimedb"
+	"github.com/minio/sha256-simd"
 )
 
 // listMultipartUploads - lists all multipart uploads.

cmd/xl-v1-object.go

@@ -18,7 +18,6 @@ package cmd
 
 import (
 	"crypto/md5"
-	"crypto/sha256"
 	"encoding/hex"
 	"hash"
 	"io"
@@ -30,6 +29,7 @@ import (
 	"github.com/minio/minio/pkg/bpool"
 	"github.com/minio/minio/pkg/mimedb"
 	"github.com/minio/minio/pkg/objcache"
+	"github.com/minio/sha256-simd"
 )
 
 // list all errors which can be ignored in object operations.