Allow make test with ASan / --address-sanitizer

[Alexander Bokovoy]

On to, 03 touko 2018, Andrew Bartlett via samba-technical wrote:
> On Thu, 2018-05-03 at 16:35 +1200, Andrew Bartlett via samba-technical
> wrote:
> > I needed to get AddressSanitizer working to fix the LSA use-after-free
> > bug and the attached make it all work again.
> > 
> > Recent versions of GCC require that the library be in LD_PRELOAD before
> > anything that is linked with libasan.  I use a horrible ldd hack to
> > find the right library path (sorry, not sorry). 
> > 
> > Once we get a more modern sn-devel I'll enable this by default in
> > autobuild. 
> 
> And this patch allows a developer build with --address-sanitizer
> enabled. 
> 
> Please review this also.
LGTM.

Pushed to autobuild.

-- 
/ Alexander Bokovoy