[gnome-keysign] flatpak: add shared-modules submodule

[Ludovico de Nittis <denittis src gnome org>]

commit 5839a5c72e93ad0ed75ea3568bfa88e36b2a08c1
Author: RyuzakiKK <aasonykk gmail com>
Date:   Tue Oct 9 14:48:20 2018 +0200

    flatpak: add shared-modules submodule

 .gitmodules            | 3 +++
 flatpak/shared-modules | 1 +
 2 files changed, 4 insertions(+)
---
diff --git a/.gitmodules b/.gitmodules
index e69de29..ff13813 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "flatpak/shared-modules"]
+       path = flatpak/shared-modules
+       url = https://github.com/flathub/shared-modules.git
diff --git a/flatpak/shared-modules b/flatpak/shared-modules
new file mode 160000
index 0000000..7d80010
--- /dev/null
+++ b/flatpak/shared-modules
@@ -0,0 +1 @@
+Subproject commit 7d800102bdcbaf6ca5adf349635a6f22be6f3328