Merge pull request #262 from ghafoors/aix_compatibility

added build tags required for gcc-go on AIX
diff --git a/attrs_unix.go b/attrs_unix.go
index ab6ecde..95e7922 100644
--- a/attrs_unix.go
+++ b/attrs_unix.go
@@ -1,4 +1,4 @@
-// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris
+// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris aix
 // +build cgo
 
 package sftp
diff --git a/server_unix.go b/server_unix.go
index 8d0c138..abceca4 100644
--- a/server_unix.go
+++ b/server_unix.go
@@ -1,4 +1,4 @@
-// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris
+// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris aix
 // +build cgo
 
 package sftp