6949 illumos nawk should be using from Makefile.master

@@ -47,11 +47,11 @@
 
 basename_cmd=basename
 cp_cmd=cp
 egrep_cmd=egrep
 mv_cmd=mv
-nawk_cmd=nawk
+nawk_cmd=${NAWK:-nawk}
 rm_cmd=rm
 sed_cmd=sed
 sort_cmd=sort
 
 # $1 is the type