syscall: make windows build again after d3963c0fca78 change

R=rsc, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/5373097
diff --git a/src/pkg/os/exec_windows.go b/src/pkg/os/exec_windows.go
index 46adb05..c4c9dcf 100644
--- a/src/pkg/os/exec_windows.go
+++ b/src/pkg/os/exec_windows.go
@@ -8,6 +8,7 @@
 	"errors"
 	"runtime"
 	"syscall"
+	"unsafe"
 )
 
 func (p *Process) Wait(options int) (w *Waitmsg, err error) {
@@ -68,14 +69,14 @@
 
 func init() {
 	var argc int32
-	cmd := GetCommandLine()
-	argv, e := CommandLineToArgv(cmd, &argc)
+	cmd := syscall.GetCommandLine()
+	argv, e := syscall.CommandLineToArgv(cmd, &argc)
 	if e != nil {
 		return
 	}
-	defer LocalFree(Handle(uintptr(unsafe.Pointer(argv))))
+	defer syscall.LocalFree(syscall.Handle(uintptr(unsafe.Pointer(argv))))
 	Args = make([]string, argc)
 	for i, v := range (*argv)[:argc] {
-		Args[i] = string(UTF16ToString((*v)[:]))
+		Args[i] = string(syscall.UTF16ToString((*v)[:]))
 	}
 }
diff --git a/src/pkg/os/file_windows.go b/src/pkg/os/file_windows.go
index 5b09888..9462426 100644
--- a/src/pkg/os/file_windows.go
+++ b/src/pkg/os/file_windows.go
@@ -9,6 +9,7 @@
 	"runtime"
 	"sync"
 	"syscall"
+	"unicode/utf16"
 )
 
 // File represents an open file descriptor.
@@ -299,7 +300,7 @@
 // TempDir returns the default directory to use for temporary files.
 func TempDir() string {
 	const pathSep = '\\'
-	dirw := make([]uint16, MAX_PATH)
+	dirw := make([]uint16, syscall.MAX_PATH)
 	n, _ := syscall.GetTempPath(uint32(len(dirw)), &dirw[0])
 	if n > uint32(len(dirw)) {
 		dirw = make([]uint16, n)