chcon: show '--reference' in help text only if LONG_OPTS=y

Signed-off-by: Xabier Oneca <xoneca@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/selinux/chcon.c b/selinux/chcon.c
index e77e9de..3ddb2dd 100644
--- a/selinux/chcon.c
+++ b/selinux/chcon.c
@@ -21,7 +21,9 @@
 //usage:#define chcon_trivial_usage
 //usage:       "[OPTIONS] CONTEXT FILE..."
 //usage:       "\n	chcon [OPTIONS] [-u USER] [-r ROLE] [-l RANGE] [-t TYPE] FILE..."
+//usage:	IF_LONG_OPTS(
 //usage:       "\n	chcon [OPTIONS] --reference=RFILE FILE..."
+//usage:	)
 //usage:
 //usage:#define chcon_full_usage "\n\n"
 //usage:       "Change the security context of each FILE to CONTEXT\n"