[Pkg-php-pecl] msgpack, igbinary updates for PHP 7.0

[Ondřej Surý]

And pushed to {master,upstream}-7.0 branches

After new igbinary and msgpack hits unstable, I have prepared updated
redis and memcached to compile with more serializers (igbinary for redis
and igbinary, json and msgpack for memcached).

I'll be digging through popcon numbers to look for more uncoverted PECL
extensions and work on them in next weeks.

Cheers,
-- 
Ondřej Surý <ondrej at sury.org>
Knot DNS (https://www.knot-dns.cz/) – a high-performance DNS server