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libccrtp was depending on commoncpp2, and have been replaced by a version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/libzrtp/sources/zrtp/libzrtpcpp/ZrtpCrc32.h b/jni/libzrtp/sources/zrtp/libzrtpcpp/ZrtpCrc32.h
index 49eec83..ad57edd 100755
--- a/jni/libzrtp/sources/zrtp/libzrtpcpp/ZrtpCrc32.h
+++ b/jni/libzrtp/sources/zrtp/libzrtpcpp/ZrtpCrc32.h
@@ -1,8 +1,8 @@
/*
- Copyright (C) 2006-2013 Werner Dittmann
+ Copyright (C) 2006-2010 Werner Dittmann
This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
+ it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.