classes/image_types_wic: Depend on do_image_complete tasks
do_image_wic now depends on the do_image_complete tasks from all it's
dependencies. This allows images recipes specified in WKS_FILE_DEPENDS
(for example, if a machine wants to put a initrd into a boot partition)
to correctly trigger rebuilds for the wic image.
Note that recrdeptask can't be used as was done for do_deploy because
this would cause circular task dependency errors. This shouldn't be
necessary anyway if the dependencies specified in WKS_FILE_DEPENDS are
complete.
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
