Update qemu-sbruno to track upstream at version 2.5.93.

Fix aarch64 bsd-user by aligning the stack properly. (andy turner).
https://github.com/seanbruno/qemu-bsd-user/commit/743fbfffc13f5717a8611e7a128c39dd9e3495d7

Fix bsd-user syscall implementation of renameat. (mikael urankar).
https://github.com/seanbruno/qemu-bsd-user/pull/20/commits/aa90a1b960f96738ae80778ac13b95508b83842a

Fix bsd-user log_file argument handling now that handling of NULL isn't
being done by the called functions.
https://github.com/seanbruno/qemu-bsd-user/commit/e3d069e8b149b7a1027837cce81b9fe68de85bf1

PR: 208952