ACPICA userland utilities reenable support for NetBSD

["Kamil Rytarowski" <n54%gmx.com@localhost>]

During an investigation of local ACPI(CA) issues in kernel,
I had to reenable ACPICA user-land utilities for NetBSD.
The pkgsrc acpidump found in sysutils/acpica-utils doesn't
work for me, so I solved it by upgrading to the newest
version (6 years newer).

The current version of acpica-utils with NetBSD
compatibility patches is available in pkgsrc-wip:
wip/acpica-utils-git

They are available at
http://pkgsrc-wip.cvs.sourceforge.net/viewvc/pkgsrc-wip/wip/acpica-utils-git/

Before upstreaming the changes I will appreciate that
someone will review it. I confess that my patches are
reenabling the compilation, rather then fixing some internal
defects.

We have got in the base FreeBSD forked version of acpidump,
but it happened to be useless for upstream [1].

[1] https://bugs.acpica.org/show_bug.cgi?id=1128