Fix errors in OSInfo device type

[GF-2504] nyx-modules: Finish implementation of OSInfo module

Open-webOS-DCO-1.0-Signed-off-by: Pekka Ropo <pekka.ropo@palm.com>

Change-Id: I9d0c0e6b926e762bdc6448876abb1197003f95f7
Reviewed-on: https://g2g.palm.com/1721
Reviewed-by: Build Verification
Tested-by: Pekka Ropo <pekka.ropo@palm.com>
Reviewed-by: Keith Derrick <keith.derrick@lge.com>