The dependencies of do_package_write_* tasks are either going to be packaging
tools needed to build the packages, or, native tools needed at postinst
time. Now we've formalised this dependency pattern, drop the hardcoded
list and work based on the rule. The package creation tools are usually
the same tools needed at rootfs/postinst time anyway so the difference is
moot.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
