luajit.pkgs.{llua-cmsgpack,lrexlib-gnu}: mark as broken

these are leaf packages, lua-cmsgpack hasn't seen a release in > 7 years
so not excited to fix/patch things.
I would probably remove those but in absence of maintainers I am not
sure. And they still work with puc lua so let's keep those in.

pkgs/development/lua-modules/overrides.nix

@@ -393,6 +393,7 @@ in
     buildInputs = old.buildInputs ++ [
       gnulib
     ];
+    meta.broken = isLuaJIT;
   });
 
   lrexlib-oniguruma = prev.lrexlib-oniguruma.overrideAttrs {
@@ -419,6 +420,10 @@ in
     ];
   });
 
+  lua-cmsgpack = prev.lua-cmsgpack.overrideAttrs {
+    meta.broken = isLuaJIT;
+  };
+
   lua-curl = prev.lua-curl.overrideAttrs (old: {
     buildInputs = old.buildInputs ++ [
       curl.dev