[gimp] build: bumping flatpak dependency to GNOME 3.24 runtime.

[Jehan Pagès <jehanp src gnome org>]

commit 639e69c6278dcdd616cc8fedd385aff4044cb2bc
Author: Jehan <jehan girinstud io>
Date:   Thu Jun 1 22:34:04 2017 +0200

    build: bumping flatpak dependency to GNOME 3.24 runtime.

 build/flatpak/flatpak-howto.txt  |    5 +++--
 build/flatpak/org.gimp.GIMP.json |    2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/build/flatpak/flatpak-howto.txt b/build/flatpak/flatpak-howto.txt
index 551e193..d071283 100644
--- a/build/flatpak/flatpak-howto.txt
+++ b/build/flatpak/flatpak-howto.txt
@@ -14,12 +14,13 @@ GIMP Flatpak HowTo
   Check out the available versions at: http://flatpak.org/runtimes.html
   Verify that we use the last runtime version in `org.gimp.GIMP.json`:
 
-> "runtime-version": "3.22"
+> "runtime-version": "3.24"
 
 * Install this runtime and the corresponding SDK if you haven't already:
 
> flatpak remote-add --from gnome https://sdk.gnome.org/gnome.flatpakrepo
-> flatpak install gnome org.gnome.Platform//3.22 org.gnome.Sdk//3.22
+> flatpak install gnome org.gnome.Platform/x86_64/3.24 org.gnome.Sdk/x86_64/3.24
+> flatpak install gnome org.gnome.Platform/i386/3.24 org.gnome.Sdk/i386/3.24
 
 Or simply update them:
 
diff --git a/build/flatpak/org.gimp.GIMP.json b/build/flatpak/org.gimp.GIMP.json
index f725fa6..516ce88 100644
--- a/build/flatpak/org.gimp.GIMP.json
+++ b/build/flatpak/org.gimp.GIMP.json
@@ -2,7 +2,7 @@
     "id": "org.gimp.GIMP",
     "branch": "master",
     "runtime": "org.gnome.Platform",
-    "runtime-version": "3.22",
+    "runtime-version": "3.24",
     "sdk": "org.gnome.Sdk",
     "command": "gimp-2.9",
     "rename-desktop-file": "gimp.desktop",