make 17 state-changing execing applets (ex: "nice PROG ARGS") noexec

The applets with "<applet> [opts] PROG ARGS" API very quickly exec
another program, noexec is okay for them:

 chpst/envdir/envuidgid/softlimit/setuidgid
 chroot
 chrt
 ionice
 nice
 nohup
 setarch/linux32/linux64
 taskset
 cttyhack

"reset" and "sulogin" applets don't have this form, but also exec
another program at once, thus made noexec too.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/cttyhack.c b/shell/cttyhack.c
index 9004b47..849fe9e 100644
--- a/shell/cttyhack.c
+++ b/shell/cttyhack.c
@@ -6,7 +6,7 @@
  */
 #include "libbb.h"
 
-//applet:IF_CTTYHACK(APPLET(cttyhack, BB_DIR_BIN, BB_SUID_DROP))
+//applet:IF_CTTYHACK(APPLET_NOEXEC(cttyhack, cttyhack, BB_DIR_BIN, BB_SUID_DROP, cttyhack))
 
 //kbuild:lib-$(CONFIG_CTTYHACK) += cttyhack.o