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libccrtp was depending on commoncpp2, and have been replaced by a version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/test/unicode.cpp b/jni/libucommon/sources/test/unicode.cpp
new file mode 100644
index 0000000..02d5978
--- /dev/null
+++ b/jni/libucommon/sources/test/unicode.cpp
@@ -0,0 +1,41 @@
+// Copyright (C) 2009-2010 David Sugar, Tycho Softworks.
+//
+// This file is part of GNU uCommon C++.
+//
+// GNU uCommon C++ is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU uCommon C++ is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with GNU uCommon C++.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef DEBUG
+#define DEBUG
+#endif
+
+#include <ucommon/ucommon.h>
+
+#include <stdio.h>
+
+using namespace UCOMMON_NAMESPACE;
+
+extern "C" int main()
+{
+    char u1[] = {(char)0xc2, (char)0xa9, 0x00};
+    char u2[] = {(char)0xe2, (char)0x89, (char)0xa0, 0x00};
+
+    assert(utf8::size(u1) == 2);
+    assert(utf8::size(u2) == 3);
+    assert(utf8::count(u1) == 1);
+    assert(utf8::count(u2) == 1);
+    assert(utf8::codepoint(u1) == 0x00a9);
+    assert(utf8::codepoint(u2) == 0x2260);
+
+	return 0;
+}