Reimplement r257525 such that it work with the historic FreeBSD make
implementation.  This fixes the toolchain and kernel-toolchain targets
when building from older FreeBSD versions where make is fmake.

Reported by:	luigi
Sponsored by:	DARPA/AFRL
MFC after:	3 days
Do not exit with error status after printing data for perftest.

Sponsored by:	Intel
Reported by:	Joe Golio <joseph.golio@emc.com>
MFC after:	3 days