[gitg] Update org.gnome.gitg.appdata.xml.in.in to pass validation on flatpak. https://github.com/flathub/or

[Alberto Fanjul <albfan src gnome org>]

commit 333eb1c0908cd246d570ae07b4f8a59d9733b2df
Author: anton-z-s <2123-anton-z-s users noreply gitlab gnome org>
Date:   Fri May 24 08:04:33 2019 +0000

    Update org.gnome.gitg.appdata.xml.in.in to pass validation on flatpak. 
https://github.com/flathub/org.gnome.gitg/pull/9#issuecomment-495494743

 data/org.gnome.gitg.appdata.xml.in.in | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/data/org.gnome.gitg.appdata.xml.in.in b/data/org.gnome.gitg.appdata.xml.in.in
index 90e9fe63..13bfad3c 100644
--- a/data/org.gnome.gitg.appdata.xml.in.in
+++ b/data/org.gnome.gitg.appdata.xml.in.in
@@ -1,9 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <component type="desktop-application">
   <id>@app-id@</id>
+  <name>gitg</name>
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-2.0+</project_license>
   <project_group>GNOME</project_group>
+  <summary>Graphical user interface for git</summary>
   <description>
     <p>
       gitg is a graphical user interface for git. It aims at being a small,