andagii: fix license, minor refactoring (#369272)

pkgs/by-name/an/andagii/package.nix

@@ -23,14 +23,11 @@ stdenvNoCC.mkDerivation {
     runHook postInstall
   '';
 
-  # There are multiple claims that the font is GPL, so I include the
-  # package; but I cannot find the original source, so use it on your
-  # own risk Debian claims it is GPL - good enough for me.
-  meta = with lib; {
+  meta = {
     homepage = "http://www.i18nguy.com/unicode/unicode-font.html";
     description = "Unicode Plane 1 Osmanya script font";
-    maintainers = with maintainers; [ raskin ];
-    license = "unknown";
-    platforms = platforms.all;
+    maintainers = [ lib.maintainers.raskin ];
+    license = lib.licenses.unfreeRedistributable; # upstream uses the term copyleft only
+    platforms = lib.platforms.all;
   };
 }