Update lv4 v1.8.0
Update lv4 v1.8.0

Relevant NEWS section since last hab package:
https://github.com/lz4/lz4/blob/810e2ca27b3561e0f6bfa7a88e0fde6faf807064/NEWS#L6-L36

Release notes for 1.8.0:
https://github.com/lz4/lz4/releases/tag/v1.8.0

Signed-off-by: Mike Fiedler <af44b651315133051dded0e55830cbf76e9bfef9@gmail.com>

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