10080 smatch Makefile changes for usr/src/cmd

*** 9,18 ****
--- 9,19 ----
  # at http://www.illumos.org/license/CDDL.
  #
  
  #
  # Copyright 2010 Chris Love.  All rights reserved.
+ # Copyright (c) 2018, Joyent, Inc.
  #
  
  
  PROG=           tail
  XPG4PROG=       $(PROG)
*** 27,36 ****
--- 28,39 ----
  
  CSTD=   $(CSTD_GNU99)
  C99LMODE=       -Xc99=%all
  LINTFLAGS +=    -I. -erroff=E_CONSTANT_CONDITION
  
+ SMOFF += leaks
+ 
  # install rules
  $(ROOTINC)/% : %
          $(INS.file)
  
  .KEEP_STATE: