[all] fixes for windows

haxetool/flashplayer.js

@@ -4,6 +4,7 @@ const fse = require('fs-extra');
 const os = require('os');
 const through = require('through2');
 const Sdk = require('./sdk');
+const System = require('./system');
 const run = require('../run/index');
 const {TailVinyl} = require('./tail');
 
@@ -29,9 +30,9 @@ class FlashPlayer extends Sdk {
 
     get link() {
         const baseUrl = `https://fpdownload.macromedia.com/pub/flashplayer/updaters/${this.version}/`;
-        if (Sdk.System.isWindows) {
+        if (System.isWindows) {
             return baseUrl + `flashplayer_${this.version}_sa${this.debug ? '_debug' : ''}.exe`;
-        } else if (Sdk.System.isLinux) {
+        } else if (System.isLinux) {
             return baseUrl + `flash_player_sa_linux${this.debug ? '_debug' : ''}.x86_64.tar.gz`;
         } else {
             throw `Unsupported os '${os.type()}'`;