6949 illumos nawk should be using from Makefile.master

*** 47,57 ****
  
  basename_cmd=basename
  cp_cmd=cp
  egrep_cmd=egrep
  mv_cmd=mv
! nawk_cmd=nawk
  rm_cmd=rm
  sed_cmd=sed
  sort_cmd=sort
  
  # $1 is the type
--- 47,57 ----
  
  basename_cmd=basename
  cp_cmd=cp
  egrep_cmd=egrep
  mv_cmd=mv
! nawk_cmd=${NAWK:-nawk}
  rm_cmd=rm
  sed_cmd=sed
  sort_cmd=sort
  
  # $1 is the type