Fix desktop-file-validate warnings. This is upstream commit:
https://trac.gajim.org/changeset/eaea5e65364b167d14dc191b00f114b4f5ccb508/

--- data/gajim-remote.desktop.in.in.orig	2015-12-28 12:38:50 UTC
+++ data/gajim-remote.desktop.in.in
@@ -1,7 +1,7 @@
 [Desktop Entry]
 Categories=Network;InstantMessaging;RemoteAccess;ConsoleOnly;
 _Name=Gajim Remote
-_Keywords=chat;messaging;im;jabber;xmpp;bonjour;voip
+_Keywords=chat;messaging;im;jabber;xmpp;bonjour;voip;
 Version=1.0
 Exec=gajim-remote handle_uri %u
 TryExec=gajim-remote