[CentOS] Packaging a library for 64-bit or multilib

Tue Aug 21 12:52:52 UTC 2018
Kenneth Porter <shiva at sewingwitch.com>

Found the problem. The spec file was using "./configure". Replacing that 
with "%configure" caused it to use the correct libdir variable.

It also revealed some more warnings at compile time, so I need to go poke 
through those.