pidl: support using pidl from top level directory

pidl needs to know if it is being used within the samba tree or not,
to get the names of some include files right. This adds support for
using pidl in the top level directory of a Samba build

This change also makes it clear that is_intree() is a boolean
function. Previously it returned different values for Samba3 and
Samba4, but there is nothing that depends on that

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>

0 files changed, 0 insertions, 0 deletions