lib/oe/package_manager: .deb pre/postinst args

lib/oe/package_manager: .deb pre/postinst args

The debian policy manual and MaintainerScripts wiki page states that the
postinst script is supposed to be called with the `configure` argument
at first install, likewise the preinst script is supposed to be called
with the `install` argument on first install.

https://www.debian.org/doc/debian-policy/ch-maintainerscripts.html
https://wiki.debian.org/MaintainerScripts

Signed-off-by: Linus Wallgren <linus.wallgren@scypho.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>