fix the error of loading loader on windows

lib/LoadersList.js

@@ -2,6 +2,8 @@
 	MIT License http://www.opensource.org/licenses/mit-license.php
 	Author Tobias Koppers @sokra
 */
+var OS = require('os');
+
 function LoadersList(list) {
 	this.list = list || [];
 	this.list.forEach(function(element) {
@@ -19,6 +21,7 @@ function regExpAsMatcher(regExp) {
 
 function asMatcher(test) {
 	if(typeof test === "string") {
+		test = /windows/i.test(OS.type()) ? test.split('/').join('\\') : test;
 		return regExpAsMatcher(new RegExp("^"+test.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&")));
 	} else if(typeof test === "function") {
 		return test;
@@ -93,4 +96,4 @@ LoadersList.prototype.matchObject = function matchObject(str, obj) {
 	if(obj.exclude)
 		if(this.matchPart(str, obj.exclude)) return false;
 	return true;
-};
+};