ugly to add -I.../usr.bin to do this. instead, add appropriate
comments in the source to where the files are actually coming from.
- use NETBSDSRCDIR as appropriate
- some minor makefile delint
that it's easier to tell from where do they come, and more easily
usable in host tool code when cut&pasted
use TAILQ_* macros as apropriate
use EXIT_FAILURE for the glob error case, too
