Installing make as pmake when WITH_BMAKE specified (was Re: [CFT/RFC]: refactor bsd.prog.mk to understand multiple programs instead of a singular program)

[Simon J. Gerraty]

>with their use of FreeBSD's make in their own projects.  So picking a
>good name now would be helpful.

FWIW I keep a copy in /usr/bin/fmake so I can compare behavior.