Bug 4873 - Ensure that the required directories exist on init

Bug 4873 - Ensure that the required directories exist on init

As systems (Ubuntu already, Debian testing is doing it too) move to
ramdisking /var/run and /var/lock, or otherwise clearing them on boot,
we need to ensure that they're there when we need them. This patch
autocreates any directories that are missing when the init script runs.

Signed-off-by: Robin Sheat <robin@catalyst.net.nz>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
(cherry picked from commit fb347c97ac996a5d50559bee62b618ad0542b947)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>