libgo: add aix build tags

    
    Reviewed-on: https://go-review.googlesource.com/86936

From-SVN: r256416

gcc/go/gofrontend/MERGE

-7ef1b48f63c0a64b83fc049884fb89677e19b2dd
+98b0942497bf2896127b71d851a79959ed3197cf
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/golang_org/x/net/internal/nettest/helper_nobsd.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 linux solaris
+// +build aix linux solaris
 
 package nettest
 

libgo/go/golang_org/x/net/internal/nettest/helper_posix.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 windows
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris windows
 
 package nettest
 

libgo/go/golang_org/x/net/internal/nettest/helper_unix.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 nettest
 

libgo/go/os/signal/internal/pty/pty.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,!android netbsd openbsd solaris
+// +build aix darwin dragonfly freebsd linux,!android netbsd openbsd solaris
 
 // Package pty is a simple pseudo-terminal package for Unix systems,
 // implemented by calling C functions via cgo.