updated pjsip stack
There is still a bug on incoming calls when buiding for android
diff --git a/jni/pjproject-android/pjlib/include/pj/guid.h b/jni/pjproject-android/pjlib/include/pj/guid.h
index 2a76af6..7b24dd5 100644
--- a/jni/pjproject-android/pjlib/include/pj/guid.h
+++ b/jni/pjproject-android/pjlib/include/pj/guid.h
@@ -1,4 +1,4 @@
-/* $Id: guid.h 4208 2012-07-18 07:52:33Z ming $ */
+/* $Id$ */
 /* 
  * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
  * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>