[gnome-music/wip/mschraal/gfm-update] subprojects: Update gfm to master

[Marinus Schraal <mschraal src gnome org>]

commit 3dccfad1ccd66fd3d6e7b0d406d886ff3c0f5953
Author: Marinus Schraal <mschraal gnome org>
Date:   Thu Feb 13 13:55:04 2020 +0100

    subprojects: Update gfm to master

 subprojects/gfm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/subprojects/gfm b/subprojects/gfm
index 956deaca..f53bde10 160000
--- a/subprojects/gfm
+++ b/subprojects/gfm
@@ -1 +1 @@
-Subproject commit 956deaca5ac104f5329bfb542c05d4a63578ee08
+Subproject commit f53bde10101e025c83868bcbad34f7a248d05262