heroic: apply patch to fix Steam shortcuts

pkgs/games/heroic/default.nix

@@ -42,6 +42,8 @@ in stdenv.mkDerivation rec {
     # Reverts part of upstream PR 2761 so that we don't have to use a non-free Electron fork.
     # https://github.com/Heroic-Games-Launcher/HeroicGamesLauncher/pull/2761
     ./remove-drm-support.patch
+    # Make Heroic create Steam shortcuts (to non-steam games) with the correct path to heroic.
+    ./fix-non-steam-shortcuts.patch
   ];
 
   configurePhase = ''

pkgs/games/heroic/fix-non-steam-shortcuts.patch

@@ -0,0 +1,13 @@
+diff --git a/src/backend/shortcuts/nonesteamgame/nonesteamgame.ts b/src/backend/shortcuts/nonesteamgame/nonesteamgame.ts
+index ebef6aa4..c8bd853d 100644
+--- a/src/backend/shortcuts/nonesteamgame/nonesteamgame.ts
++++ b/src/backend/shortcuts/nonesteamgame/nonesteamgame.ts
+@@ -252,7 +252,7 @@ async function addNonSteamGame(props: {
+     // add new Entry
+     const newEntry = {} as ShortcutEntry
+     newEntry.AppName = props.gameInfo.title
+-    newEntry.Exe = `"${app.getPath('exe')}"`
++    newEntry.Exe = `"heroic"`
+     newEntry.StartDir = `"${process.cwd()}"`
+ 
+     if (isFlatpak) {