guests: Add macOS 10.15
Note that I haven't actually tried running lcitool update or lcitool build against a macOS machine: I've tested the Dockerfile generator (using the --variables option introduced by !30 (merged)) only.
Note that I haven't actually tried running lcitool update or lcitool build against a macOS machine: I've tested the Dockerfile generator (using the --variables option introduced by !30 (merged)) only.