[gnome-photos] flatpak: Disable documentation generation for GEGL

[Debarshi Ray <debarshir src gnome org>]

commit 3b5d0c88119006a35f3b8220a92ed4f2268d9ff1
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Mar 10 14:23:33 2017 +0100

    flatpak: Disable documentation generation for GEGL
    
    They don't add any value to the Flatpak.

 flatpak/org.gnome.Photos.json |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/flatpak/org.gnome.Photos.json b/flatpak/org.gnome.Photos.json
index 22f5825..b042d74 100644
--- a/flatpak/org.gnome.Photos.json
+++ b/flatpak/org.gnome.Photos.json
@@ -151,6 +151,7 @@
         {
             "name": "gegl",
             "cleanup": [ "/bin" ],
+            "config-opts": [ "--disable-docs" ],
             "sources": [
                 {
                     "type": "git",