Updated flatpak file sources for the new file requirements (#441)

Author: thesupersonic16

flatpak/io.github.hedge_dev.unleashedrecomp.json

@@ -38,6 +38,16 @@
           "path": "private/default.xex",
           "dest": "UnleashedRecompLib/private"
         },
+        {
+          "type": "file",
+          "path": "private/default.xexp",
+          "dest": "UnleashedRecompLib/private"
+        },
+        {
+          "type": "file",
+          "path": "private/default_patched.xex",
+          "dest": "UnleashedRecompLib/private"
+        },
         {
           "type": "file",
           "path": "private/shader.ar",