efl-mono: Fix --enable-mono-beta for tests

Reviewers: bu5hm4n, vitor.sousa, segfaultxavi, woohyun, Jaehyun_Cho, YOhoho, lauromoura

Reviewed By: lauromoura

Subscribers: cedric, reviewers, committers

Tags: efl

Differential Revision: https://phab.enlightenment.org/D8573