emulators/rvvm-devel: update to 0.7-g20260826

• use "tput me" in post-test to not spill onto the terminal
• add elf_aux_info() codepath for armv7
• fix stripping (upstream installs libraries correctly these days)

Changelog: https://github.com/LekKit/RVVM/commits/a662c0edd507b4e04f20d44490c514b683007ae7

Event: EuroBSDcon Devsummit 2026