loki-setup: use xdg-desktop-menu instead of loki-setup legacy menu entries

misc/setup/install-desktop-files.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+set -e
+if ! test -e "$SETUP_INSTALLPATH"/ioquake3.desktop.in; then
+  exit 0
+fi
+xdg_desktop_menu=`which xdg-desktop-menu 2>/dev/null`
+if test "x$xdg_desktop_menu" = x; then
+  xdg_desktop_menu=./xdg-desktop-menu
+fi
+sed -e "s#^Exec=.*#Exec=$SETUP_INSTALLPATH/ioquake3#" \
+    -e "s#^Icon=.*#Icon=$SETUP_INSTALLPATH/quake3.png#" \
+    < $SETUP_INSTALLPATH/ioquake3.desktop.in \
+    > $SETUP_INSTALLPATH/ioquake3.desktop
+$xdg_desktop_menu install --novendor $SETUP_INSTALLPATH/ioquake3.desktop