[gimp] build: sync with development flatpak.

[Jehan <jehanp src gnome org>]

commit 039be5d00e0368fa2c0830fd7db86e3cd81ff280
Author: Jehan <jehan girinstud io>
Date:   Thu May 27 11:45:32 2021 +0200

    build: sync with development flatpak.
    
    - dri access needed (cf. commit de8be943 on our Flathub repo).
    - GNOME runtime still only provides lcms 2.10 (even in its master build)
      and we need version 2.12 to avoid some crashes (cf. commit ae60863e
      from our flathub repo).
    
    Trying to keep the differences to a minimum. There are still some, like
    the extension point is absent from the nightly manifest, but I'm not
    sure if it makes sense to have it there.
    Also top "cleanup" list is different but we should probably take a
    closer look at this. Maybe it's outdated on both sides anyway.

 build/flatpak/org.gimp.GIMP-nightly.json | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/build/flatpak/org.gimp.GIMP-nightly.json b/build/flatpak/org.gimp.GIMP-nightly.json
index fd9db8e263..3c9edc4331 100644
--- a/build/flatpak/org.gimp.GIMP-nightly.json
+++ b/build/flatpak/org.gimp.GIMP-nightly.json
@@ -10,6 +10,7 @@
     "rename-icon": "gimp",
     "finish-args": ["--share=ipc", "--share=network",
                     "--socket=x11", "--socket=wayland",
+                    "--device=dri",
                     "--filesystem=host", "--filesystem=xdg-config/GIMP",
                     "--filesystem=xdg-config/gtk-3.0", "--filesystem=/tmp",
                     "--filesystem=xdg-run/gvfs", "--filesystem=xdg-run/gvfsd",
@@ -60,6 +61,18 @@
                 }
             ]
         },
+        {
+            "name": "lcms2",
+            "config-opts": [ "--disable-static" ],
+            "cleanup": [ "/bin", "/share" ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": 
"https://src.fedoraproject.org/repo/pkgs/rpms/lcms2/lcms2-2.12.tar.gz/sha512/967e8ac9a1d1aa3be45dc82362b9bc71c555e8577441efda57dc12d0bf84ed9188460c52eb8542d399ce9ab43bd4191988ed22b254ef34c6c1877bbb935952ed/lcms2-2.12.tar.gz";,
+                    "sha512": 
"967e8ac9a1d1aa3be45dc82362b9bc71c555e8577441efda57dc12d0bf84ed9188460c52eb8542d399ce9ab43bd4191988ed22b254ef34c6c1877bbb935952ed"
+                }
+            ]
+        },
         {
             "name": "openexr",
             "modules": [