vendor: explicitly vendor golang.org/x/sys

Vendor golang.org/x/sys to get the UtimesNanoAt function defined for all
unix-like OSes. The function will be used in a successive commit.

This also re-vendors the other dependencies from glide.yaml.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

vendor/golang.org/x/crypto/bcrypt/bcrypt_test.go

@@ -224,20 +224,3 @@ func BenchmarkGeneration(b *testing.B) {
 		GenerateFromPassword(passwd, 10)
 	}
 }
-
-// See Issue https://github.com/golang/go/issues/20425.
-func TestNoSideEffectsFromCompare(t *testing.T) {
-	source := []byte("passw0rd123456")
-	password := source[:len(source)-6]
-	token := source[len(source)-6:]
-	want := make([]byte, len(source))
-	copy(want, source)
-
-	wantHash := []byte("$2a$10$LK9XRuhNxHHCvjX3tdkRKei1QiCDUKrJRhZv7WWZPuQGRUM92rOUa")
-	_ = CompareHashAndPassword(wantHash, password)
-
-	got := bytes.Join([][]byte{password, token}, []byte(""))
-	if !bytes.Equal(got, want) {
-		t.Errorf("got=%q want=%q", got, want)
-	}
-}