More build breakage

[Dennis Ferguson <dennis.c.ferguson%gmail.com@localhost>]

I'm having this problem with a tree updated at 00:45 UTC.
i386, amd64 and macppc all agree on the problem.

#   compile  libgdb/bsd-kvm.o
[...]
/usr/NetBSD/src/gnu/dist/gdb6/gdb/bsd-kvm.c: In function 
'bsd_kvm_fetch_registers':
/usr/NetBSD/src/gnu/dist/gdb6/gdb/bsd-kvm.c:226: error: invalid use of 
undefined type 'struct lwp'
/usr/NetBSD/src/gnu/dist/gdb6/gdb/bsd-kvm.c: In function 'bsd_kvm_proc_cmd':
/usr/NetBSD/src/gnu/dist/gdb6/gdb/bsd-kvm.c:290: error: invalid use of 
undefined type 'struct lwp'

Dennis Ferguson