git: 0ff539eb7ca5..438a1101dc1f - vendor/bc - vendor branch updated

[Stefan Eßer]

The branch vendor/bc has been updated by se:

URL: https://cgit.FreeBSD.org/src/log/?id=0ff539eb7ca5..438a1101dc1f

438a1101dc1f contrib/bc: import version 6.5.0