[dtrace] syscall provider naming convention.

[Artem Belevich]

>>> I have one comment though.  I am not sure about renaming syscall.ko to
>>> syscall_freebsd.ko.
>> I've renamed it for consistency with other systrace provider variants.
>> I can change it back.
>
> I think that I would prefer this.
> If only for POLA reasons.

Done. New patch is here:
https://sites.google.com/site/abc678site/files/dt-systrace-20101224.patch.gz

By the way, the patch contains several files generated by "make
sysent". If the patch is applied to sources other than
stable/8 at 216436, then "make sysent" should be re-done in
amd64/linux32, i386/linux and compat/freebsd32.

--Artem