PHP bindings fail on Ubuntu for xapian-bindings-1.2.21

[Olly Betts]

On Sat, Mar 26, 2016 at 06:52:18PM -0500, Yannick Warnier wrote:
> Nevermind, there seems to be some kind of issue (in wily) about
> libxapian22 vs libxapian22v5. When doing all over again with
> libxapian22v5, it works enabled in Apache, as expected.

Ah yes, this is the GCC5/C++11 change I guessed might be the cause -
libxapian22 is built with the older GCC (and pre-C++11 ABI),
libxapian22v5 is built with the newer GCC (and C++11 ABI).

Cheers,
    Olly