Added elementaryOS as linux

[mara-kr]

No description provided.

[ssbanerje]

Hi @mara-kr, Thanks for sending in the PR.

Could you please confirm that this works with the version of distro that is included in lib/? Since I dont daily drive elementaryOS, it might be difficult for me to test this. Currently, the list of supported distributions is taken from here and mirrors the submodule in the lib/ folder. Maybe it might make sense to add this in the upstream distro dependency and then bump up the submodule to the latest version. That way distro's testing/review process can check for this.