Compile libix

Reference: /n/patches.lsub.org/patch/complibix
Date: Wed Jun 13 10:54:44 CES 2012
Signed-off-by: paurea@lsub.org

--- /sys/src/mkfile	Sat Apr 28 18:27:50 2012
+++ /sys/src/mkfile	Wed Jun 13 10:54:04 2012
@@ -22,6 +22,7 @@
 	libhtml\
 	libhttpd\
 	libip\
+	libix\
 	liblex\
 	libmach\
 	libmemdraw\