make: unifdef for MAKETOOL and DISTRIBUTED (undefined)

*** 12,22 ****
  # Copyright 2015, Richard Lowe.
  
  PROG=   make
  OBJS=   ar.o            \
          depvar.o        \
-         dist.o          \
          doname.o        \
          dosys.o         \
          files.o         \
          globals.o       \
          implicit.o      \
--- 12,21 ----