syscall: gofmt -w -s

Change-Id: Ib46f1a528e16cd0c2617defbf4dcd1f1b582cdc2
Reviewed-on: https://go-review.googlesource.com/c/go/+/171101
Run-TryBot: Mikio Hara <mikioh.public.networking@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/syscall/fs_js.go

@@ -38,9 +38,9 @@ type jsFile struct {
 
 var filesMu sync.Mutex
 var files = map[int]*jsFile{
-	0: &jsFile{},
-	1: &jsFile{},
-	2: &jsFile{},
+	0: {},
+	1: {},
+	2: {},
 }
 
 func fdToFile(fd int) (*jsFile, error) {