Bug#751532: Bug#750811: brltty: FTBFS on kfreebsd*

[Matthias Klose <doko@ubuntu.com>]

> Shouldn't the package for kfreebsd* have the files in a different
> sub-directory? linux just feels wrong on kfreebsd. I expect (but don't
> know for sure) that the resolver is smart enough to look in a
> sub-directory matching the os, but as I would expect not look in the
> directory named by a different os.

you need to pass both

  -I/usr/lib/jvm/default-java/include
  -I/usr/lib/jvm/default-java/include/linux

there are no predefined names for KFreeBSD and the Hurd upstream. So I think
just using linux everywhere is good enough for Debian.