Add autocutsel tool.

pkgs/tools/X11/autocutsel/default.nix

@@ -0,0 +1,27 @@
+{stdenv, fetchurl, libX11, libXaw}:
+
+let
+  name = "autocutsel-0.9.0";
+in
+stdenv.mkDerivation {
+  inherit name;
+ 
+  src = fetchurl {
+    url = "http://savannah.nongnu.org/download/autocutsel/${name}.tar.gz";
+    sha256 = "0hp335qq57l0kp58pfwb0bk930zx5497frq8y0lzr4icvk1fpw5y";
+  };
+ 
+  buildInputs = [ libX11 libXaw ];
+  installPhase = ''
+   mkdir -p $out/bin
+   cp autocutsel $out/bin/
+   '';
+
+  meta = {
+    homepage = "http://www.nongnu.org/autocutsel/";
+    description = "Autocutsel tracks changes in the server's cutbuffer and CLIPBOARD selection.";
+    license = "GNU/GPL";
+    maintainers = with stdenv.lib.maintainers; [];
+    platforms = with stdenv.lib.platforms; all;
+  };
+}