[gnome-builder] .gitlab-ci.yml: declare dependancy between the flatpak and the nightly_publish job

[Jordan Petridis <jpetridis src gnome org>]

commit 8e73f91f0da97f8b17aba2eef492727da85e54db
Author: Jordan Petridis <jpetridis gnome org>
Date:   Mon Sep 30 12:22:33 2019 +0300

    .gitlab-ci.yml: declare dependancy between the flatpak and the nightly_publish job

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3a436803a..54d7edfbc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -40,3 +40,5 @@ stop_review:
 
 nightly:
   extends: '.publish_nightly'
+  dependencies:
+        - 'flatpak'