remove some GNUisms. by Dan Fandrich (dan AT coneharvesters.com)

function                                             old     new   delta
logdirs_reopen                                      1310    1308      -2
read_line_input                                     4757    4753      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-6)               Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/selinux/setfiles.c b/selinux/setfiles.c
index b410d7e..aabc371 100644
--- a/selinux/setfiles.c
+++ b/selinux/setfiles.c
@@ -347,7 +347,7 @@
 		 * same.  For "-vv", emit everything. */
 		if (verbose > 1 || !user_only_changed) {
 			bb_info_msg("%s: reset %s context %s->%s",
-				applet_name, my_file, context ?: "", newcon);
+				applet_name, my_file, context ? context : "", newcon);
 		}
 	}