unix: code for AIX ppc and ppc64, for gccgo

Change-Id: I187edceaf3604d73110940bd5580fa127a85e87d
Reviewed-on: https://go-review.googlesource.com/129735
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
diff --git a/unix/timestruct_test.go b/unix/timestruct_test.go
index 4215f46..1a72fdb 100644
--- a/unix/timestruct_test.go
+++ b/unix/timestruct_test.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 darwin dragonfly freebsd linux netbsd openbsd solaris
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package unix_test