bluej: fix with non-binary wrapper for wrapGAppsHook

The use of --add-flags in this derivation assumed quotes to be expanded, which the binary
         wrapper (which wrapGAppsHook uses since #164163) will not do.

pkgs/applications/editors/bluej/default.nix

@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
   preFixup = ''
     makeWrapper ${jdk}/bin/java $out/bin/bluej \
       "''${gappsWrapperArgs[@]}" \
-      --add-flags "-Djavafx.embed.singleThread=true -Dawt.useSystemAAFontSettings=on -Xmx512M -cp \"$out/share/bluej/bluej.jar\" bluej.Boot"
+      --add-flags "-Djavafx.embed.singleThread=true -Dawt.useSystemAAFontSettings=on -Xmx512M -cp $out/share/bluej/bluej.jar bluej.Boot"
   '';
 
   meta = with lib; {