INST: script to adapt fsl installation to SCT on Linux
INST: script to adapt fsl installation to SCT on Linux

Former-commit-id: 06fefbbb9729bfe26a2a767855695ef6fa6ac990
Former-commit-id: a000d117e23f58ed1e40f0e4ec3abec2a42744c5
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox