[gnome-games] flatpak: Open access to Steam flatpak directory

[Adrien Plazas <aplazas src gnome org>]

commit 1038268837447a8c7baa2f94755414d05e77e062
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Fri Aug 10 02:09:47 2018 +0500

    flatpak: Open access to Steam flatpak directory
    
    This is needed to be able to display games from Steam installed via
    Flatpak.

 flatpak/org.gnome.Games.json | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/flatpak/org.gnome.Games.json b/flatpak/org.gnome.Games.json
index 36e42d75..a400456a 100644
--- a/flatpak/org.gnome.Games.json
+++ b/flatpak/org.gnome.Games.json
@@ -35,7 +35,9 @@
         /* Needed for joypads, until we have a proper portal */
         "--device=all",
         /* Needed to find the ROMs */
-        "--filesystem=home:ro"
+        "--filesystem=home:ro",
+        /* Needed to find flatpaked Steam games */
+        "--filesystem=~/.var/app/com.valvesoftware.Steam:ro"
     ],
     "build-options" : {
         "cflags" : "-O2 -g",