upstart: Use new update-alternatives functionality

* fixes:
  WARNING: upstart: Use of ALTERNATIVE_NAME is deprecated,
  see update-alternatives.bbclass for more info.

[OWEBOS-2684] upstart: Remove warning about use of deprecated ALTERNATIVE_NAME

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Change-Id: I9c222ddd796f33041e3b71f9d591cab5f1813811
Reviewed-on: http://g2g.palm.com/1143
Reviewed-by: Martin Jansa <martin.jansa@palm.com>
Tested-by: Martin Jansa <martin.jansa@palm.com>
Reviewed-by: Susan Montooth <susan.montooth@palm.com>