snappy: install libc6:i386 on amd64 images for multiarch support out of the box. (LP: #1444049)

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (2.326) UNRELEASED; urgency=medium
+
+  * snappy: install libc6:i386 on amd64 images for multiarch support out of
+    the box. (LP: #1444049)
+
+ -- Oliver Grawert <ogra@ubuntu.com>  Tue, 07 Jul 2015 11:49:46 +0200
+
 livecd-rootfs (2.325) wily; urgency=medium
 
   * live-build/ubuntu-touch/includes.chroot/etc/lightdm/lightdm.conf.d/

live-build/ubuntu-core/hooks/12-add-foreign-libc6.chroot

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -ex
+
+echo "I: Checking if we are amd64 and libc6:i386 should be installed"
+
+if [ "$(dpkg --print-architecture)" = "amd64" ]; then
+    echo "I: Enabling i386 multiarch support on amd64"
+    dpkg --add-architecture i386
+
+    apt-get -y update
+
+    echo "I: Installing libc6:i386 in amd64 image"
+    apt-get -y install libc6:i386
+
+    echo "I: Removing /var/lib/apt/lists/*"
+    find /var/lib/apt/lists/ -type f | xargs rm -f
+
+    echo "I: Removing /var/cache/apt/*.bin"
+    rm -f /var/cache/apt/*.bin
+fi