INST: install_sct: now covers linux
INST: install_sct: now covers linux

Former-commit-id: 8d89189a759b8cd2a3fd6ecdea2ed3830374166a
Former-commit-id: aa8fb701def3bca1db7c881fd2fca318a7633950
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox