[gnome-builder] build: disable shallow clones for Builder

[Christian Hergert <chergert src gnome org>]

commit c76a68250a9bf7567c75453ffcfccc4c06479adc
Author: Christian Hergert <chergert redhat com>
Date:   Mon Feb 19 14:19:12 2018 -0800

    build: disable shallow clones for Builder
    
    I think that we have a failing vcs_tag() in meson without the history to
    determine how far off we are from a tag.

 build-aux/flatpak/org.gnome.Builder.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index ab281cb36..979b8acca 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -723,6 +723,7 @@
                 "-Dwith_help=true",
                 "-Dwith_channel=flatpak-nightly"
             ],
+            "disable-shallow-clone": true,
             "sources" : [
                 {
                     "type" : "git",