Some tests under qemu take >10minutes each and time out. x86_64 is the only arch that's native in gitlab CI AND bpo, so only run tests if on that arch. Signed-off-by: Clayton Craft <craftyguy@postmarketos.org> [ci:skip-build]: already built successfully in CI (except aarch64, because runners are broken currently) Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8246>