media-video/olive: fix pkg_postinst for xdg functions

Package-Manager: Portage-3.0.12, Repoman-3.0.2
Signed-off-by: Alfred Wingate <parona@protonmail.com>

media-video/olive/olive-9999.ebuild

@@ -1,4 +1,4 @@
-# Copyright 2020 Gentoo Authors
+# Copyright 2020-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -67,4 +67,5 @@ pkg_postinst() {
 	einfo "Olive crashes at runtime when playing video"
 	einfo "with ~ffmpeg-4.3. The current remedy is to"
 	einfo "use ~ffmpeg-4.2 or ffmpeg-9999 instead."
+	xdg_pkg_postinst
 }