* #39101: updated pjsip stack, many android build enhancements.

The main issue here is due to the build system of the stack compared to a pure Android
NDK project. Generating arm and x86 ABI at the same time does not seem to be possible.
diff --git a/jni/pjproject-android/pjlib-util/include/pjlib-util.h b/jni/pjproject-android/pjlib-util/include/pjlib-util.h
index b8cc0c7..d06a791 100644
--- a/jni/pjproject-android/pjlib-util/include/pjlib-util.h
+++ b/jni/pjproject-android/pjlib-util/include/pjlib-util.h
@@ -1,4 +1,4 @@
-/* $Id: pjlib-util.h 4688 2013-12-10 10:58:10Z bennylp $ */
+/* $Id: pjlib-util.h 4704 2014-01-16 05:30:46Z ming $ */
 /* 
  * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
  * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
@@ -55,6 +55,9 @@
 /* XML */
 #include <pjlib-util/xml.h>
 
+/* JSON */
+#include <pjlib-util/json.h>
+
 /* Old STUN */
 #include <pjlib-util/stun_simple.h>