runtime: add various +build sparc64 lines

Change-Id: Id7e0879c85d7ae85996ba9037e3915158c3f2d70

Author: 4ad

src/runtime/cputicks.go

@@ -6,6 +6,7 @@
 // +build !arm64
 // +build !mips64
 // +build !mips64le
+// +build !sparc64
 
 package runtime
 

src/runtime/hash64.go

@@ -6,7 +6,7 @@
 //   xxhash: https://code.google.com/p/xxhash/
 // cityhash: https://code.google.com/p/cityhash/
 
-// +build amd64 amd64p32 arm64 mips64 mips64le ppc64 ppc64le
+// +build amd64 amd64p32 arm64 mips64 mips64le ppc64 ppc64le sparc64
 
 package runtime
 

src/runtime/unaligned2.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build arm ppc64 ppc64le mips64 mips64le
+// +build arm ppc64 ppc64le mips64 mips64le sparc64
 
 package runtime