Update sys/unix/Makefile.src to force it to build monst.o and
objects.o before attempting to build makedefs, so that building
the latter doesn't use the rules for those two object files in
Makefile.utl. Prior to this, if 'make' was building multiple
targets in parallel monst.o and/or objects.o might be clobbered
when a process using util/Makefile tries to build them while its
parent is also building them via src/Makefile.
This includes a bit of reformatting which wasn't present in
yesterday's email attachment.
105fd0a9a2