Switch lzo download from https to http
Switch lzo download from https to http

lzo's download server does not present a valid certificate, so that downloads via https are failing. Spack's MD5 checksum still ensure a safe download.

Closes #1675.

krafczyk/spack,LLNL/spack,matthiasdiener/spack,tmerrick1/spack,krafczyk/spack,tmerrick1/spack,tmerrick1/spack,skosukhin/spack,TheTimmy/spack,mfherbst/spack,mfherbst/spack,EmreAtes/spack,iulian787/spack,mfherbst/spack,matthiasdiener/spack,mfherbst/spack,matthiasdiener/spack,skosukhin/spack,iulian787/spack,LLNL/spack,lgarren/spack,mfherbst/spack,tmerrick1/spack,lgarren/spack,tmerrick1/spack,lgarren/spack,matthiasdiener/spack,skosukhin/spack,lgarren/spack,matthiasdiener/spack,TheTimmy/spack,krafczyk/spack,LLNL/spack,EmreAtes/spack,TheTimmy/spack,iulian787/spack,TheTimmy/spack,EmreAtes/spack,LLNL/spack,iulian787/spack,iulian787/spack,EmreAtes/spack,lgarren/spack,TheTimmy/spack,krafczyk/spack,EmreAtes/spack,skosukhin/spack,krafczyk/spack,LLNL/spack,skosukhin/spack