[gitg] Tag master as nightly build

[Alberto Fanjul <albfan src gnome org>]

commit 251ff35f0197a0c309c95bf709157c4f61c5751d
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Sun Oct 7 09:59:19 2018 +0200

    Tag master as nightly build

 org.gnome.Gitg.json | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/org.gnome.Gitg.json b/org.gnome.Gitg.json
index e00f4adf..ba170cc7 100644
--- a/org.gnome.Gitg.json
+++ b/org.gnome.Gitg.json
@@ -10,7 +10,9 @@
     "rename-icon" : "gitg",
     "copy-icon" : true,
     "tags" : [
+        "nightly"
     ],
+    "desktop-file-name-prefix" : "(Nightly) ",
     "finish-args" : [
         "--share=ipc",
         "--share=network",