add var/lib/snapd/classic in ubuntu-core

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.415) UNRELEASED; urgency=medium
+
+  * add var/lib/snapd/classic in ubuntu-core
+
+ -- Michael Vogt <michael.vogt@ubuntu.com>  Wed, 08 Jun 2016 19:10:13 +0200
+
 livecd-rootfs (2.414) yakkety; urgency=medium
 
   * Update post-debootstrap hashes for ubuntu-touch.

live-build/ubuntu-core/hooks/700-classic-dir

@@ -0,0 +1,13 @@
+#!/bin/sh
+#
+# removing debian packaging artifacts
+
+set -ex
+
+echo "I: Adding var/lib/snapd/classic"
+
+PREFIX=binary/boot/filesystem.dir
+
+(cd $PREFIX
+ install -m755 -d var/lib/snapd/classic
+)