selinux/*: -Wunused-parameter fixes
runsv: make it NOMMU-capable

function                                             old     new   delta
startservice                                         291     313     +22
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 22/0)               Total: 22 bytes

diff --git a/selinux/selinuxenabled.c b/selinux/selinuxenabled.c
index 114d2b6..c6e947c 100644
--- a/selinux/selinuxenabled.c
+++ b/selinux/selinuxenabled.c
@@ -8,7 +8,7 @@
 #include "libbb.h"
 
 int selinuxenabled_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int selinuxenabled_main(int argc, char **argv)
+int selinuxenabled_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	return !is_selinux_enabled();
 }