bwidget: Add missing meta attributes.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

pkgs/development/libraries/bwidget/default.nix

@@ -21,4 +21,10 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ tcl ];
+
+  meta = {
+    homepage = "http://tcl.activestate.com/software/tcllib/";
+    description = "The BWidget toolkit is a high-level widget set for Tcl/Tk.";
+    license = stdenv.lib.licenses.tcltk;
+  };
 }