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>

unix/syscall_unix_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
 
@@ -146,6 +146,9 @@ func TestPassFD(t *testing.T) {
 	if runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
 		t.Skip("cannot exec subprocess on iOS, skipping test")
 	}
+	if runtime.GOOS == "aix" {
+		t.Skip("getsockname issue on AIX 7.2 tl1, skipping test")
+	}
 
 	if os.Getenv("GO_WANT_HELPER_PROCESS") == "1" {
 		passFDChild()