[gimp] build: syncing recent changes from stable flatpak manifest.

[Jehan <jehanp src gnome org>]

commit ea14ce7ff4847b1db9cc26a38f6d68b80355c292
Author: Jehan <jehan girinstud io>
Date:   Wed Jun 6 21:30:13 2018 +0200

    build: syncing recent changes from stable flatpak manifest.

 build/flatpak/org.gimp.GIMP-nightly.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/build/flatpak/org.gimp.GIMP-nightly.json b/build/flatpak/org.gimp.GIMP-nightly.json
index 66cebc367d..8131c30b63 100644
--- a/build/flatpak/org.gimp.GIMP-nightly.json
+++ b/build/flatpak/org.gimp.GIMP-nightly.json
@@ -5,11 +5,12 @@
     "runtime-version": "3.28",
     "sdk": "org.gnome.Sdk",
     "command": "gimp-2.99",
+    "separate-locales": false,
     "rename-desktop-file": "gimp.desktop",
     "rename-icon": "gimp",
     "finish-args": ["--share=ipc", "--socket=x11", "--share=network",
                     "--filesystem=host", "--filesystem=xdg-config/GIMP",
-                    "--filesystem=xdg-config/gtk-3.0",
+                    "--filesystem=xdg-config/gtk-3.0", "--filesystem=/tmp",
                     "--talk-name=org.gtk.vfs", "--talk-name=org.gtk.vfs.*" ],
     "tags": ["GTK+3", "nightly"],
     "desktop-file-name-prefix": "(Nightly) ",