pangoxsl: add meta data

pkgs/development/libraries/pangoxsl/default.nix

@@ -13,7 +13,10 @@ stdenv.mkDerivation {
     pango
   ];
 
-  meta = {
-    platforms = stdenv.lib.platforms.unix;
+  meta = with stdenv.lib; {
+    description = "Implements several of the inline properties defined by XSL that are not currently implemented by Pango.";
+    homepage = https://sourceforge.net/projects/pangopdf;
+    platforms = platforms.unix;
+    license = licenses.lgpl2;
   };
 }