Rename several xlat structures to avoid collisions

* bjm.c (which): Rename to qm_which.
* ipc.c (msg_flags): Rename to ipc_msg_flags.
* time.c (which): Rename to itimer_which.
diff --git a/bjm.c b/bjm.c
index d7acff0..6fe6f5a 100644
--- a/bjm.c
+++ b/bjm.c
@@ -69,7 +69,7 @@
 	long usecount;
 };
 
-static const struct xlat which[] = {
+static const struct xlat qm_which[] = {
 	XLAT(0),
 	XLAT(QM_MODULES),
 	XLAT(QM_DEPS),
@@ -96,7 +96,7 @@
 	if (entering(tcp)) {
 		printstr(tcp, tcp->u_arg[0], -1);
 		tprints(", ");
-		printxval(which, tcp->u_arg[1], "QM_???");
+		printxval(qm_which, tcp->u_arg[1], "QM_???");
 		tprints(", ");
 	} else {
 		size_t ret;