problem cross-compiling 9.1

[Daniel Braniss]

when using an amd64 host to 'make buildworld' it seems that
it's using the wrong cpp, at least when building ioctl.c via mkioctl in
usr.bin/ktrace and having set WITHOUT_CPP(*). This used to work with
previous releases.

*: Im compiling for an embedded system, and hence I want the minimum stuff.

at the moment the work around is to remove the WITHOUT_CPP, but it got me
worried.

any fix?

cheers,
	danny