Add hook that removes all apt lists for ubuntu-touch images. Our apport now works without them on the read-only images and this way we can save up some space.

live-build/ubuntu-touch/hooks/99-remove-lists.chroot

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# remove-lists: Remove all apt lists for space as our apport does not need them
+#
+# Author: Łukasz 'sil2100' Zemczak <achiang@canonical.com>
+# Date  : September 22, 2015
+
+echo "Removing /var/lib/apt/lists/*"
+find /var/lib/apt/lists/ -type f | xargs rm -f