10080 smatch Makefile changes for usr/src/cmd

@@ -24,10 +24,11 @@
 # Copyright (c) 1997-1999 by Sun Microsystems, Inc.
 # All rights reserved.
 #
 # Copyright 2015 Nexenta Systems, Inc.  All right reserved.
 #
+# Copyright (c) 2018, Joyent, Inc.
 
 .KEEP_STATE:
 
 PROG    =       spec2trace
 

@@ -47,5 +48,9 @@
 
 CERRWARN +=     -_gcc=-Wno-parentheses
 CERRWARN +=     -_gcc=-Wno-switch
 CERRWARN +=     -_gcc=-Wno-unused-variable
 CERRWARN +=     -_gcc=-Wno-unused-label
+
+# not linted
+SMATCH=off
+