git: 898b46e93011..54d20d67e2af - vendor/bc - vendor branch updated

[Stefan Eßer]

The branch vendor/bc has been updated by se:

URL: https://cgit.FreeBSD.org/src/log/?id=898b46e93011..54d20d67e2af

54d20d67e2af vendor/bc: upgrade to version 7.0.0