updated pjsip stack
There is still a bug on incoming calls when buiding for android
diff --git a/jni/pjproject-android/pjsip-apps/src/pjsua/pjsua_app_config.h b/jni/pjproject-android/pjsip-apps/src/pjsua/pjsua_app_config.h
index 216757f..40a24ed 100644
--- a/jni/pjproject-android/pjsip-apps/src/pjsua/pjsua_app_config.h
+++ b/jni/pjproject-android/pjsip-apps/src/pjsua/pjsua_app_config.h
@@ -1,4 +1,4 @@
-/* $Id: pjsua_app_config.h 4492 2013-04-23 10:59:52Z nanang $ */
+/* $Id$ */
 /*
  * Copyright (C) 2008-2013 Teluu Inc. (http://www.teluu.com)
  *