adding twinkle, a voice over IP phone software

svn path=/nixpkgs/trunk/; revision=17303

pkgs/development/libraries/ccrtp/default.nix

@@ -0,0 +1,19 @@
+args: with args;
+stdenv.mkDerivation {
+  name = "ccrtp-1.7.0";
+
+  src = fetchurl {
+    url = mirror://gnu/ccrtp/ccrtp-1.7.0.tar.gz;
+    sha256 = "1bjn5l476nk34gipz4jl2p83m735gzanzr046zrkx423zipx4g4j";
+  };
+
+  buildInputs = [openssl pkgconfig libgcrypt commoncpp2];
+
+  meta = { 
+    description = "GNU ccRTP is an implementation of RTP, the real-time transport protocol from the IETF";
+    homepage = "http://www.gnu.org/software/ccrtp/";
+    license = "GPLv2";
+    maintainers = [args.lib.maintainers.marcweber];
+    platforms = args.lib.platforms.linux;
+  };
+}