[gnome-music/wip/mschraal/core] flatpak: Use a fixed branch for Grilo

[Marinus Schraal <mschraal src gnome org>]

commit fb071a20236fd5b2156dac8ea6249f11fb3d171b
Author: Marinus Schraal <mschraal gnome org>
Date:   Mon Jul 15 23:20:37 2019 +0200

    flatpak: Use a fixed branch for Grilo
    
    See grilo!41.

 org.gnome.Music.json | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/org.gnome.Music.json b/org.gnome.Music.json
index 96e90aeb..2d86606b 100644
--- a/org.gnome.Music.json
+++ b/org.gnome.Music.json
@@ -99,11 +99,12 @@
         {
             "name": "grilo",
             "buildsystem": "meson",
-           "config-opts": [ "-Denable-gtk-doc=false" ],
+            "config-opts": [ "-Denable-gtk-doc=false" ],
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://gitlab.gnome.org/GNOME/grilo.git";
+                    "url": "https://gitlab.gnome.org/GNOME/grilo.git";,
+                    "branch": "wip/mschraal/fix-tracker-0.3.8"
                 }
             ],
             "cleanup": [ "/include", "/bin" ]