lutris: set unshareIpc and unsharePid to false

This copies a workaround required for steam, as the same issue occurs in lutris.

See https://github.com/NixOS/nixpkgs/pull/109466

Fixes battle.net client crashing on startup and overwatch crashing.

Fixes https://github.com/NixOS/nixpkgs/issues/195126

pkgs/applications/misc/lutris/fhsenv.nix

···
     ln -sf ${lutris-unwrapped}/share/icons $out/share
   '';
 
+  # allows for some gui applications to share IPC
+  # this fixes certain issues where they don't render correctly
+  unshareIpc = false;
+
+  # Some applications such as Natron need access to MIT-SHM or other
+  # shared memory mechanisms. Unsharing the pid namespace
+  # breaks the ability for application to reference shared memory.
+  unsharePid = false;
+
   meta = {
     inherit (lutris-unwrapped.meta)
       homepage