[gimp] flatpak: enable BMFF format support in exiv2

[Daniel Novomeský <dnovomesky src gnome org>]

commit 0f8f3c3f1ad43945882ed75471f3bda00910e8ad
Author: Daniel Novomeský <dnovomesky gmail com>
Date:   Fri Sep 23 13:30:12 2022 +0200

    flatpak: enable BMFF format support in exiv2
    
    Improves AVIF, HEIF, JPEG XL metadata support.

 build/flatpak/org.gimp.GIMP-nightly.json | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/build/flatpak/org.gimp.GIMP-nightly.json b/build/flatpak/org.gimp.GIMP-nightly.json
index 44eac55478..9d15b0f1c6 100644
--- a/build/flatpak/org.gimp.GIMP-nightly.json
+++ b/build/flatpak/org.gimp.GIMP-nightly.json
@@ -51,6 +51,9 @@
                 {
                     "name": "exiv2",
                     "buildsystem": "cmake-ninja",
+                    "config-opts": [
+                        "-DEXIV2_ENABLE_BMFF=ON"
+                    ],
                     "builddir": true,
                     "cleanup": [
                         "/bin",