Add example env files specifically for OmniOS

@@ -20,11 +20,11 @@
 #
 # Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
 #
 
 ENVFILES= \
-        illumos
+        illumos omnios-illumos-omnios omnios-illumos-gate
 
 include ../Makefile.tools
 
 FILEMODE= 644