the mkfile is broken: missed the $objtype directory.

Reference: /n/sources/patch/applied/mkfile-broken
Date: Sun Jul 15 18:52:18 CES 2007
Signed-off-by: andrey@lanl.gov

--- /sys/src/ape/lib/ap/mkfile	Sun Jul 15 18:51:25 2007
+++ /sys/src/ape/lib/ap/mkfile	Sun Jul 15 18:51:23 2007
@@ -1,7 +1,7 @@
 APE=/sys/src/ape
 <$APE/config
 
-DIRS=gen math plan9 posix stdio syscall
+DIRS=gen math plan9 posix stdio syscall $objtype
 
 default:V:	all