[epiphany] AppData: Mark as unremovable in GNOME Software

[Richard Hughes <rhughes src gnome org>]

commit a7f28dfbbaeb3cd89dc86cedd6ab571a8542af3e
Author: Richard Hughes <richard hughsie com>
Date:   Mon Mar 28 16:40:29 2016 +0100

    AppData: Mark as unremovable in GNOME Software

 data/epiphany.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/epiphany.appdata.xml.in b/data/epiphany.appdata.xml.in
index 1c10d0a..82dd9d0 100644
--- a/data/epiphany.appdata.xml.in
+++ b/data/epiphany.appdata.xml.in
@@ -32,6 +32,7 @@
     <kudo>UserDocs</kudo>
   </kudos>
   <project_group>GNOME</project_group>
+  <compulsory_for_desktop>GNOME</compulsory_for_desktop>
   <project_license>GPL-2.0+</project_license>
   <_developer_name>The GNOME Project</_developer_name>
   <url type="bugtracker">https://bugzilla.gnome.org/enter_bug.cgi?product=epiphany</url>