libprocstat compile error

[Randy Bush]

same here

===> lib/libprocstat (depend)
rm -f .depend
mkdep -f .depend -a    -I. -I/usr/src/lib/libprocstat -D_KVM_VNODE -DZFS
/usr/src/lib/libprocstat/cd9660.c /usr/src/lib/libprocstat/common_kvm.c
/usr/src/lib/libprocstat/libprocstat.c
/usr/src/lib/libprocstat/msdosfs.c /usr/src/lib/libprocstat/ntfs.c
/usr/src/lib/libprocstat/nwfs.c /usr/src/lib/libprocstat/smbfs.c
/usr/src/lib/libprocstat/udf.c
/usr/src/lib/libprocstat/nwfs.c:44:26: error: fs/nwfs/nwfs.h: No such
file or directory
/usr/src/lib/libprocstat/nwfs.c:45:31: error: fs/nwfs/nwfs_node.h: No
such file or directory
mkdep: compile failed
*** Error code 1