sysutils/vm-bhyve: Update to 1.1.8

Upstream changelog:
Add ability to set ignore_bad_msr="yes" which is required on AMD processors for
some guests in order to avoid crashes if the guest tries to access registers
that are not implemented.

Also adds generic bhyve_options configuration setting to pass arbitrary
arguments to the bhyve(8) command.

PR: 219860
Submitted by: maintainer