clighter8 (vim): set libclang path to lib output

pkgs/misc/vim-plugins/overrides.nix

@@ -109,7 +109,7 @@ with generated;
 
   clighter8 = clighter8.overrideAttrs(old: {
     preFixup = ''
-      sed "/^let g:clighter8_libclang_path/s|')$|${llvmPackages.clang.cc}/lib/libclang.so')|" \
+      sed "/^let g:clighter8_libclang_path/s|')$|${llvmPackages.clang.cc.lib}/lib/libclang.so')|" \
         -i "$out"/share/vim-plugins/clighter8/plugin/clighter8.vim
     '';
   });