allow iprint to put stuff in /dev/kmesg.

Reference: /n/atom/patch/applied2013/kprintiprint
Date: Sun Dec 29 17:51:10 CET 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/port/devcons.c	Sun Dec 29 17:50:58 2013
+++ /sys/src/nix/port/devcons.c	Sun Dec 29 17:51:00 2013
@@ -32,7 +32,7 @@
 static	int	nconsdevs = 3;
 static	Consdev	consdevs[Nconsdevs] =
 {
-	{nil, nil,	kmesgputs,	0, },			/* kmesg */
+	{nil, nil,	kmesgputs,	Ciprint, },		/* kmesg */
 	{nil, nil,	kprintputs,	Csync|Ciprint, },		/* kprint */
 	{nil, nil,	uartputs,		Csync|Ciprint|Cntorn, },	/* serial (botch! must be 2d) */
 };