Switch commoncpp2 to ucommon to solve dependency conflicts.

libccrtp was depending on commoncpp2, and have been replaced by a version
depending on ucommon as well.
diff --git a/jni/libucommon/sources/NEWS b/jni/libucommon/sources/NEWS
new file mode 100644
index 0000000..d227dc0
--- /dev/null
+++ b/jni/libucommon/sources/NEWS
@@ -0,0 +1,37 @@
+uCommon Library NEWS -- history of visible user changes. Updated 2008-04-15.
+
+uCommon C++ 0.4 codebase completed and ready for release with the introduction
+of the GNU GPL V3.  This is a complete rewrite of UCommon as a C++ library for
+threading and design patterns suitable for deeply embedded targets.
+
+uCommon C++ 0.7 codebase now has core documentation and basic library theory in
+header files.  This documentation can be generated with doxygen or by using
+"make doxy".
+
+uCommon C++ 1.0 release has been simplified, fully documented, and modified in
+specific ways to simplify the migration and merge with GNU Common C++ to form
+GNU Common C++ 2.0.
+
+uCommon C++ 1.5 release begins the process of migrating GNU Common C++ into the
+core GNU uCommon C++ codebase. Some GNU Common C++ classes, including tcp
+streaming, xml parser, and persist, have been revised and integrated for the
+1.5.0 release itself.  Other GNU Common C++ classes will be integrated as
+requested and needed.  The 1.5/1.x series will actually be the last UCommon
+release sets, as GNU uCommon C++ 2.0 will instead be released as GNU Common C++
+2 2.0.
+
+uCommon C++ 2.0 released under the GNU Lesser General Public License, Version 3
+or later.
+
+uCommon C++ 2.1 is considered a refactored abi release offering greater
+clarity, consistency of use, and additional features that were migrated from
+Common C++. The 2.1 release series may continue to introduce additional
+classes.
+
+ucommon 3.0 merges other ucommon related libraries to create a single ucommon
+framework for application development.
+
+ucommon 3.1 introduced the ucommon secure framework with support for ssl
+sockets, random number generation, ciphering, and digest computation.
+Further cryptographic features will be added over time.
+