10080 smatch Makefile changes for usr/src/cmd

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  PROG = fsstat
  OBJS = fsstat.o
  SRCS =$(OBJS:%.o=%.c) $(COMMON_SRCS)
  
*** 38,47 ****
--- 39,50 ----
  CERRWARN += -_gcc=-Wno-parentheses
  FILEMODE= 0555
  
  lint := LINTFLAGS = -muxs -I$(STATCOMMONDIR)
  
+ SMOFF += signed
+ 
  .KEEP_STATE:
  
  all: $(PROG)
  
  install: all $(ROOTPROG)