Bug#852354: move ptlib.pc to a multiarch location

[Helmut Grohne]

On Mon, Jan 23, 2017 at 09:19:24PM +0100, Eugen Dedu wrote:
> Thank you for the patch.  If you tested the patch and it works, do you mind
> to upload it too?

Yeah, I tested that it makes the opal build go further. Still, changing
--libdir moves other files and thus as a small non-zero chance of
introducing a regression. I therefore suggest postponing the bug until
after stretch as we are very close to the full freeze now. We shouldn't
be fixing non-rc bugs now.

Helmut