* #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/include/pj/string.h b/jni/pjproject-android/pjlib/include/pj/string.h
index 849a474..20be005 100644
--- a/jni/pjproject-android/pjlib/include/pj/string.h
+++ b/jni/pjproject-android/pjlib/include/pj/string.h
@@ -1,4 +1,4 @@
-/* $Id: string.h 4440 2013-03-14 07:18:13Z riza $ */
+/* $Id: string.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>
@@ -575,6 +575,15 @@
 				   unsigned base);
 
 /**
+ * Convert string to float.
+ *
+ * @param str	the string.
+ *
+ * @return the value.
+ */
+PJ_DECL(float) pj_strtof(const pj_str_t *str);
+
+/**
  * Utility to convert unsigned integer to string. Note that the
  * string will be NULL terminated.
  *