fix(@angular/cli): license plugin config

Author: tarekis

packages/@angular/cli/tasks/eject.ts

@@ -155,7 +155,7 @@ class JsonWebpackSerializer {
   }
 
   private _licenseWebpackPlugin(plugin: any) {
-    return plugin.options;
+    return this._licenseReplacer(plugin.options);
   }
 
   private _uglifyjsPlugin(plugin: any) {
@@ -395,6 +395,13 @@ class JsonWebpackSerializer {
     });
   }
 
+  private _licenseReplacer(value: any) {
+    return Object.assign({}, value, {
+      outputTemplate: this._relativePath(
+        'process.cwd()', path.relative(this._root, value.outputTemplate))
+    });
+  }
+
   private _replacer(_key: string, value: any) {
     if (value === undefined) {
       return value;