test: add build magic comment test use syscall package

Signed-off-by: Koichi Shiraishi <[email protected]>

tests/syscall.go

@@ -0,0 +1,16 @@
+// Copyright 2016 Koichi Shiraishi. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+func main() {
+	syscall.TIOCGETA
+	unix.TIOCGE
+}

tests/syscall_linux.go

@@ -0,0 +1,15 @@
+// Copyright 2016 Koichi Shiraishi. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+
+package main
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+func main() {
+	unix.TCGETS
+}

tests/syscall_windows.go

@@ -0,0 +1,13 @@
+// Copyright 2016 Koichi Shiraishi. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build windows
+
+package main
+
+import "golang.org/x/sys/windows"
+
+func main() {
+	windows.
+}