dhcp: Add upstart script for dhclient

- Add upstart script for dhclient (from HP webOS 3.0.5). Script calls
  dhclient, but only in VirtualBox.
- Move no_bash_required-webos.patch to unversioned dhcp directory.

[OWEBOS-2725]: Can't ssh into qemux86 build when running in VirtualBox

Open-webOS-DCO-1.0-Signed-off-by: Steve Lemke <steve.lemke@palm.com>
Change-Id: I0cfdfa74686c37b7022e5fc31d913005335c7477
Reviewed-on: http://g2g.palm.com/829
Reviewed-by: Herb Kuta <herb.kuta@palm.com>
Reviewed-by: Martin Jansa <martin.jansa@palm.com>
Reviewed-by: Build Verification
Reviewed-by: Steve Lemke <steve.lemke@palm.com>
Tested-by: Steve Lemke <steve.lemke@palm.com>