science/libaec: Update to 1.1.7
Changes: https://github.com/Deutsches-Klimarechenzentrum/libaec/releases
https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/master/CHANGELOG.md
(cherry picked from commit 8838fc816ee42e0f5baa780903eec2fe62ff2648)