Missing memcache-store.so on Amazon Linux

[Peter Schober]

* Mansoor Mirza <mmirza at Ticketmanager.com> [2018-04-25 06:40]:
> I have installed version 2.6.1 release 3.1.el6 on Amazon Linux

I don't know about that file specifically but "el6" seems to signal
that it's meant for RedHat Enterprise Linux 6, not "Amazon Linux".

-peter