Prior to this change, script S95hello.sh would:

1. mount sdcard
2. call scripts
3. print ASCII art
4. launch bmc daemon

However, the new version of BMC daemon (aptly named bmcd) which warrants
its own proper startup script, needs to launch after steps 1-2, but
prior to ASCII-art being printed.

Split steps 1-2 and 3 into their own scripts, with priorities 93 and 99
respectively, and remove redundant .sh suffix. The new daemon will start
at priority 94. User-defined scripts can run on priorities 95-98.

The ASCII-art could be moved to /etc/issue by using a post-build.sh
script, however this would cause the art to be printed several times
on boot and login.

When start-stop-daemon(8) daemonizes a process, it closes stdout and
stderr (which is technically the whole point of daemons) but that leaves
us and users with no way to see bmcd's output. Since it is the most
important daemon on the system, enable seeing its output and to do so,
upgrade start-stop-daemon from lean busybox version to debian's.