[gnome-photos] flatpak: Build gexiv2 from Git master

[Debarshi Ray <debarshir src gnome org>]

commit d9576e44d529bc99f19a5ae7dfff4df58e19dfe6
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Sep 11 20:09:31 2017 +0200

    flatpak: Build gexiv2 from Git master
    
    It is now possible to build from Git with --disable-introspection.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787455

 flatpak/org.gnome.Photos.json |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/flatpak/org.gnome.Photos.json b/flatpak/org.gnome.Photos.json
index 123cd12..84dfb6e 100644
--- a/flatpak/org.gnome.Photos.json
+++ b/flatpak/org.gnome.Photos.json
@@ -191,9 +191,8 @@
             "config-opts": [ "--disable-introspection" ],
             "sources": [
                 {
-                    "type": "archive",
-                    "url": "https://download.gnome.org/sources/gexiv2/0.10/gexiv2-0.10.6.tar.xz";,
-                    "sha256": "132788919667254b42c026ab39ab3c3a5be59be8575c05fa4b371ca8aed55825"
+                    "type": "git",
+                    "url": "git://git.gnome.org/gexiv2"
                 }
             ]
         },