Support for ARM achitecture

[grasph]

Do you have a use case for ARM Linux

Not urgently, no. We just finally have an NVIDIA ARM+GPU system and I wanted to give it a try. :-) But ARM is, as you probably know, definitely coming to the LHC grid and HEP computing in general, so we should support it, if possible. Does the _jll have to be built "manually", or can we automatize it?

Originally posted by @oschulz in #22

[grasph]

It is built automatically.

[oschulz]

It is built automatically.

Oh, nice - in that case. adding ARM versions of the _jll would be great.