[all] fixes for windows

haxetool/android.js

@@ -2,8 +2,8 @@ const fs = require('fs');
 const path = require('path');
 const exec = require('./exec');
 const {StringWritable} = require('./tail');
+const System = require('./system');
 const Command = require('../run/command');
-
 const through = require('through2');
 const Sdk = require('./sdk');
 const Env = require('./env');
@@ -25,7 +25,7 @@ class Android extends Sdk {
     }
 
     get link() {
-        const system = Sdk.System.isWindows ? 'windows' : Sdk.System.isLinux ? 'linux' : null;
+        const system = System.isWindows ? 'windows' : System.isLinux ? 'linux' : null;
         if (!system) throw 'Unsupported system';
         if (this.version.indexOf('.') > -1) {
             return `https://dl.google.com/android/repository/tools_r${this.version}-${system}.zip`;