cmd/internal/goobj: update builtin list

Change-Id: I8a903b76d80f451b498b145b14c97f96191e05f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/486775
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: abner-chenc

src/cmd/internal/goobj/builtinlist.go

@@ -53,7 +53,7 @@ func main() {
 func mkbuiltin(w io.Writer) {
 	pkg := "runtime"
 	fset := token.NewFileSet()
-	path := filepath.Join("..", "..", "compile", "internal", "typecheck", "builtin", "runtime.go")
+	path := filepath.Join("..", "..", "compile", "internal", "typecheck", "_builtin", "runtime.go")
 	f, err := parser.ParseFile(fset, path, nil, 0)
 	if err != nil {
 		log.Fatal(err)