Try fixing build.

Change-Id: I6e8085f75788b6595fa30aaeb1b667207e8a53b7
diff --git a/sl4a/Common/src/com/googlecode/android_scripting/facade/media/MediaScannerFacade.java b/sl4a/Common/src/com/googlecode/android_scripting/facade/media/MediaScannerFacade.java
index 3f43c99..8ce2259 100644
--- a/sl4a/Common/src/com/googlecode/android_scripting/facade/media/MediaScannerFacade.java
+++ b/sl4a/Common/src/com/googlecode/android_scripting/facade/media/MediaScannerFacade.java
@@ -46,7 +46,7 @@
     public MediaScannerFacade(FacadeManager manager) {

         super(manager);

         mService = manager.getService();

-        mScanService = new MediaScanner(mService);

+        mScanService = new MediaScanner(mService, "external");

         mEventFacade = manager.getReceiver(EventFacade.class);

         mReceiver = new MediaScannerReceiver();

     }