webos-desktop-common: Add a file to initialize shared variables

Change-Id: I4661054e1ccc22855735c184763809470cc889b4
Open-webOS-DCO-1.0-Signed-off-by: Mikko Levonmaa <mikko.levonmaa@palm.com>
Reviewed-on: http://g2g.palm.com/1286
Reviewed-by: Build Verification
Reviewed-by: Eric Blade <eric.blade@palm.com>
Reviewed-by: Mikko Levonmaa <mikko.levonmaa@palm.com>
Tested-by: Mikko Levonmaa <mikko.levonmaa@palm.com>
Reviewed-by: Roger Stringer <roger.stringer@palm.com>
Reviewed-on: http://g2g.palm.com/1306
Tested-by: Roger Stringer <roger.stringer@palm.com>