lsb: Add .bbappend to generate desired lsb-release file

[GF-1465] Supply mechanism to report OS release and build information

Open-webOS-DCO-1.0-Signed-off-by: Janne Hurskainen <janne.hurskainen@palm.com>

Change-Id: I535ada614bbf6eb6dbd4297571d45c3507781c94
Reviewed-on: https://g2g.palm.com/1652
Reviewed-by: Janne Hurskainen <janne.hurskainen@palm.com>
Tested-by: Janne Hurskainen <janne.hurskainen@palm.com>
Reviewed-by: Build Verification
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>