ubuntu-cpc: Remove unneeded packages from the root.tar.{gz,xz} (LP: #1534764)

debian/changelog

@@ -1,3 +1,11 @@
+livecd-rootfs (2.209.7) trusty; urgency=medium
+
+  [Ben Howard]
+  * Remove unneeded packages from the root.tar.{gz,xz} cloud image targets
+    (LP: #1534764).
+
+ -- Robert C Jennings <robert.jennings@canonical.com>  Tue, 23 May 2017 20:45:47 -0500
+
 livecd-rootfs (2.209.6) trusty; urgency=medium
 
   [Daniel Watkins]

live-build/ubuntu-cpc/hooks/030-root-tarball.binary

@@ -15,6 +15,7 @@ chroot binary/boot/filesystem.dir chmod +x /usr/sbin/grub-probe
 
 env DEBIAN_FRONTEND=noninteractive chroot binary/boot/filesystem.dir apt-get --purge remove --assume-yes '^linux-.*'
 env DEBIAN_FRONTEND=noninteractive chroot binary/boot/filesystem.dir apt-get --purge remove --assume-yes '^grub-.*'
+env DEBIAN_FRONTEND=noninteractive chroot binary/boot/filesystem.dir apt-get autoremove --purge --assume-yes
 
 chroot binary/boot/filesystem.dir rm /usr/sbin/grub-probe
 chroot binary/boot/filesystem.dir dpkg-divert --remove --local --rename /usr/sbin/grub-probe

live-build/ubuntu-cpc/hooks/999-extras.binary

@@ -11,8 +11,5 @@ fi
 # Export the common functions to the extras
 . /build/config/functions
 
-# Execute extra binary hooks
-for recipe in $(find ${extra_d} -type f -executable -maxdepth 1);
-do
-    bash -xue ${recipe}
-done
+# Cleaner execution
+/bin/run-parts ${extra_d}