system-image: add /usr/local/bin/xdg-open dbus helper

debian/changelog

@@ -1,6 +1,7 @@
 livecd-rootfs (2.411) UNRELEASED; urgency=medium
 
   * update kernel snap building to match the new kernel policy
+  * system-image: add /usr/local/bin/xdg-open dbus helper
 
  -- Michael Vogt <michael.vogt@ubuntu.com>  Tue, 10 May 2016 18:16:56 -0700
 

live-build/ubuntu-core/hooks/500-create-xdg-wrapper

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+set -ex
+
+echo "I: Creating xdg helper"
+
+PREFIX=binary/boot/filesystem.dir
+
+mkdir -p $PREFIX/usr/local/bin
+cat >$PREFIX/usr/local/bin/xdg-open <<EOF
+#!/bin/sh
+cat <<'EOF'
+dbus-send --print-reply --session --dest=com.canonical.SnappyUrlHelper / com.canonical.SnappyUrlHelper.XdgOpen string:"$1"
+EOF
+chmod 755 $PREFIX/usr/local/bin/xdg-open
+