cmd/link, crypto/tls: don't use append loops

Change-Id: Ib47e295e8646b769c30fd81e5c7f20f964df163e
Reviewed-on: https://go-review.googlesource.com/36335Reviewed-by: Filippo Valsorda <hi@filippo.io>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/link/internal/ld/deadcode.go

@@ -254,9 +254,7 @@ func (d *deadcodepass) init() {
 				}
 			}
 		}
-		for _, name := range markextra {
-			names = append(names, name)
-		}
+		names = append(names, markextra...)
 		for _, s := range dynexp {
 			d.mark(s, nil)
 		}

src/crypto/tls/common.go

@@ -946,9 +946,7 @@ func initDefaultCipherSuites() {
 	}
 
 	varDefaultCipherSuites = make([]uint16, 0, len(cipherSuites))
-	for _, topCipher := range topCipherSuites {
-		varDefaultCipherSuites = append(varDefaultCipherSuites, topCipher)
-	}
+	varDefaultCipherSuites = append(varDefaultCipherSuites, topCipherSuites...)
 
 NextCipherSuite:
 	for _, suite := range cipherSuites {