Add LICENSE file symlinks to individual crate directories
This way, 'cargo publish' correctly includes the license texts in published crates.
Pointed out in https://bugzilla.redhat.com/show_bug.cgi?id=2231654
This way, 'cargo publish' correctly includes the license texts in published crates.
Pointed out in https://bugzilla.redhat.com/show_bug.cgi?id=2231654