ubuntu-cpc: Add /dev/pts to hook env, also settle disks after UEFI builds

debian/changelog

@@ -1,3 +1,12 @@
+livecd-rootfs (2.209.4) trusty; urgency=medium
+
+  [Ben Howard]
+  * ubuntu-cpc:
+    - add devpts-live to hook builds
+    - add logic to settle the disks after UEFI builds
+
+ -- Robert C Jennings <robert.jennings@canonical.com>  Tue, 23 May 2017 20:12:47 -0500
+
 livecd-rootfs (2.209.3) trusty; urgency=medium
 
   [Ben Howard]

live-build/ubuntu-cpc/functions

@@ -46,6 +46,7 @@ mount_partition() {
 
     mount "$partition" "$mountpoint"
     mount --bind /dev "$mountpoint/dev"
+    mount devpts-live -t devpts "$mountpoint/dev/pts"
     mount proc-live -t proc "$mountpoint/proc"
     mount sysfs-live -t sysfs "$mountpoint/sys"
     mv "$mountpoint/etc/resolv.conf" resolv.conf.tmp
@@ -58,6 +59,7 @@ umount_partition() {
     mv resolv.conf.tmp "$mountpoint/etc/resolv.conf"
     umount "$mountpoint/proc"
     umount "$mountpoint/sys"
+    umount "$mountpoint/dev/pts"
     umount "$mountpoint/dev"
     umount "$mountpoint"
 }

live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary

@@ -116,7 +116,11 @@ EOF
     chroot mountpoint apt-get -y update
 
     rm mountpoint/tmp/device.map
+    sync
     umount mountpoint/boot/efi
+    sleep 5
+    udevadm settle
+    mount
     umount_partition mountpoint
     rmdir mountpoint
 }