[gnome-build-meta] elements/core-deps/libgdata.bst: Use known working commit

[Javier Jardón Cabezas <jjardon src gnome org>]

commit 7c908fb420c2caef24919aa66b6f8a406714500d
Author: Javier Jardón <jjardon gnome org>
Date:   Wed Jul 31 16:00:04 2019 +0100

    elements/core-deps/libgdata.bst: Use known working commit
    
    See https://gitlab.gnome.org/GNOME/libgdata/issues/32

 elements/core-deps/libgdata.bst | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/elements/core-deps/libgdata.bst b/elements/core-deps/libgdata.bst
index 640b40c7..987b4222 100644
--- a/elements/core-deps/libgdata.bst
+++ b/elements/core-deps/libgdata.bst
@@ -2,6 +2,7 @@ kind: meson
 sources:
 - kind: git_tag
   url: gitlab_gnome_org:GNOME/libgdata.git
+  ref: f54d68f961015f85595b956ff0143a6ee0c41ff7
   track: master
 depends:
 - core-deps/gnome-online-accounts.bst