[gnome-desktop] Don't use bubblewrap in snaps since those are already sandboxed

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 49e6a3b4304bf1f4a1cba8158c2fc5c8b3e016e9
Author: Sebastien Bacher <seb128 ubuntu com>
Date:   Mon May 23 17:15:35 2022 +0200

    Don't use bubblewrap in snaps since those are already sandboxed

 libgnome-desktop/gnome-desktop-thumbnail-script.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/libgnome-desktop/gnome-desktop-thumbnail-script.c 
b/libgnome-desktop/gnome-desktop-thumbnail-script.c
index 34669571..a3c8e800 100644
--- a/libgnome-desktop/gnome-desktop-thumbnail-script.c
+++ b/libgnome-desktop/gnome-desktop-thumbnail-script.c
@@ -948,6 +948,9 @@ script_exec_new (const char  *uri,
       else
         exec->sandbox = SANDBOX_TYPE_NONE;
     }
+  /* Similarly for snaps */
+  else if (g_getenv ("SNAP_NAME") != NULL)
+    exec->sandbox = SANDBOX_TYPE_NONE;
   else
     exec->sandbox = SANDBOX_TYPE_BWRAP;
 #endif