xfce4-session: add missing update-desktopdb trigger and required rundep.

Bump revision.

--HG--
extra : convert_revision : e77eb46e6e4827a466f5ff8fff9d47c74c32db42

templates/xfce4-session/template

@@ -2,6 +2,7 @@
 pkgname=xfce4-session
 sourcepkg=$pkgname
 version=4.6.1
+revision=1
 distfiles="http://mocha.xfce.org/archive/xfce-$version/src/$pkgname-$version.tar.bz2"
 build_style=gnu_configure
 short_desc="Xfce session manager"
@@ -12,7 +13,7 @@ long_desc="
 
 conf_files="/etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfce4-session.xml"
 gtk_iconcache_dirs="/usr/share/icons/hicolor"
-triggers="gtk-icon-cache"
+triggers="gtk-icon-cache update-desktopdb"
 
 subpackages="devel" 
 Add_dependency build pkg-config
@@ -23,3 +24,4 @@ Add_dependency full gtk+
 Add_dependency full dbus-glib
 Add_dependency full libxfcegui4
 Add_dependency full hicolor-icon-theme
+Add_dependency full desktop-file-utils