archivers/liblz4: Update to 1.9.3

ChangeLog: https://github.com/lz4/lz4/releases/tag/v1.9.3

• Switch from gmake to meson.
• Enable tests

PR: 251183
Submitted by: daniel.engberg.lists@pyret.net
Approved by: martin@waschbuesch.de (maintainer)