[baobab] AppData: Mark as unremovable in GNOME Software

[Richard Hughes <rhughes src gnome org>]

commit a24a7e97ac30d737ef1f1634b496dd89e3cf10ec
Author: Richard Hughes <richard hughsie com>
Date:   Mon Mar 28 16:28:09 2016 +0100

    AppData: Mark as unremovable in GNOME Software

 data/org.gnome.baobab.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/org.gnome.baobab.appdata.xml.in b/data/org.gnome.baobab.appdata.xml.in
index bcb5fc4..f0866c1 100644
--- a/data/org.gnome.baobab.appdata.xml.in
+++ b/data/org.gnome.baobab.appdata.xml.in
@@ -21,5 +21,6 @@
   <url type="homepage">https://wiki.gnome.org/Apps/Baobab</url>
   <updatecontact>stefano.facchini_at_gmail.com</updatecontact>
   <project_group>GNOME</project_group>
+  <compulsory_for_desktop>GNOME</compulsory_for_desktop>
   <translation type="gettext">baobab</translation>
 </application>