conf/177845: WITH_BMAKE does not work on CURRENT

[Simon J. Gerraty]

>This looks exactly like the same problem I reported to you in private

Yes it does.  As noted; the error is the result of bmake passing its
-J flag onto an invokation of the old make.
The prevelance of makefiles which have bare invocations of 'make' mean
that's a reasonable possibility when /usr/bin/make is FreeBSD make.

I thought I'd spotted a flaw in src/Makefile that might explain it (at
least if /usr/bin/make is FreeBSD make), but I just finished two
buildworld's in a tree updated yesterday, one with /usr/bin/make being
FreeBSD make, and one with it being bmake - both succeeded.

So perhaps there is an option I don't have set which is relevant.
I only have  WITH_CTF and WITH_BMAKE, perhaps I'm not hitting any of the
offending makefiles.