As part of the XDEV/XDEV_ARCH deprecation, the
'xdev-links' target was intentionally no longer
invoked automatically.

Invoke the xdev-links target after xdev, which
creates, for example, /usr/bin/armv6-freebsd-cc
symlink to /usr/armv6-freebsd/usr/bin/cc.

Sponsored by: The FreeBSD Foundation