Add in Belos build
Add in Belos build

Some users need Belos and experiments I've done show that only specific, old
versions of Belos work, and that these are distributed with Trilinos because
life is hard.

Also made variable syntax consistent.

UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts