• Don't strip module on amd64 systems [1]
• Bump PORTREVISION

[1] ipmi-kmod seg faults on amd64 machines when running kldxref during

installation, and when attempting to load ipmi.ko the machine will
crash. Neither problems seems to occur if the module is not stripped prior
to installation.

PR: 100703
Submitted by: Nick Barkas <snb@threerings.net> (maintainer)