Convert parser of struct sigevent to new mpers infrastructure

* defs.h (sigev_value): New prototype.
(printsigevent): Remove.
* print_sigevent.c (struct_sigevent): New typedef.  Mpersify it.
[IN_MPERS]: Do not include "xlat/sigev_value.h".
(printsigevent32): Remove.
(printsigevent): Rename to print_sigevent.  Mpersify it.
* mq.c (sys_mq_notify): Rename printsigevent to print_sigevent.
* time.c (sys_timer_create): Likewise.
diff --git a/time.c b/time.c
index 429f461..91e0915 100644
--- a/time.c
+++ b/time.c
@@ -514,7 +514,7 @@
 	if (entering(tcp)) {
 		printclockname(tcp->u_arg[0]);
 		tprints(", ");
-		printsigevent(tcp, tcp->u_arg[1]);
+		print_sigevent(tcp, tcp->u_arg[1]);
 		tprints(", ");
 	} else {
 		printnum_int(tcp, tcp->u_arg[2], "%d");