More rpath test fixes depending on distro.
More rpath test fixes depending on distro.

luarocks binary gets returned as "ASCII text" under Ubuntu.

apinf/api-umbrella,apinf/api-umbrella,apinf/api-umbrella,apinf/api-umbrella,NREL/api-umbrella,NREL/api-umbrella,NREL/api-umbrella,apinf/api-umbrella,NREL/api-umbrella