Specify a regex to run-parts so that cloud image extra scripts are found

and executed.

debian/changelog

@@ -2,6 +2,8 @@ livecd-rootfs (2.373) UNRELEASED; urgency=medium
 
   * Set timeout options so ppc64el cloud images don't display a grub boot
     menu (matching the behaviour of other cloud images).
+  * Specify a regex to run-parts so that cloud image extra scripts are found
+    and executed.
 
  -- Daniel Watkins <daniel.watkins@canonical.com>  Thu, 28 Jan 2016 09:32:36 +0000
 

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

@@ -12,4 +12,4 @@ fi
 . /build/config/functions
 
 # Cleaner execution
-/bin/run-parts ${extra_d}
+/bin/run-parts --regex ".*\.binary" "${extra_d}"