Update gliff to 0.2.0

gliff now lives at omacom/gliff and cuts tagged releases, so build
the tag archive instead of a pinned commit and watch its tags.

The codec moved to VA-API: add libva, and dbus for notifications.
Install the launcher entry and icon, with the icon cache hook, and
ship the OpenH264 license.

pkgbuilds/gliff/gliff.install

@@ -0,0 +1,12 @@
+post_install() {
+  command -v update-desktop-database >/dev/null 2>&1 && update-desktop-database -q
+  command -v gtk-update-icon-cache >/dev/null 2>&1 && gtk-update-icon-cache -q -t -f usr/share/icons/hicolor
+}
+
+post_upgrade() {
+  post_install
+}
+
+post_remove() {
+  post_install
+}