Add bc utility to required dependencies
Add bc utility to required dependencies

While many distributions install bc as part of the minimal install
or as a dependency for the build-essential some do not.  Since bc
is required by the ZFS Test Suite add it as a required dependency.

This patch also address a typo, s/utilties/utilities/g.

Signed-off-by: Brian Behlendorf <32d50ad1e384dcb9a5bf7e40fa470df5dabaf348@llnl.gov>

gmelikov/zfs-buildbot,gmelikov/zfs-buildbot,zfsonlinux/zfs-buildbot,zfsonlinux/zfs-buildbot