Add Manufacturing Version Query to OSInfo module

:Release Notes:
The OSInfo interface now provides the NYX_OS_INFO_MANUFACTURING_VERSION
query enumeration value for modules to implement.

:Detailed Notes:
Added NYX_OS_INFO_MANUFACTURING_VERSION to the list of operating system
values which can be queried.

This takes nyx-lib to version 5.2.0 .

Also refactored a utility routine to suppress an "unused-result" warning
and eliminate an inelegant 'goto'.

:Testing Performed:
Compiled and tested on desktop and emulator.

:QA Notes:

:Issues Addressed:
[GF-12714] Supply a "manufacturing version" for webOS
[GF-13442] nyx-lib: Add NYX_OS_INFO_MANUFACTURING_VERSION query to
           OSInfo

Open-webOS-DCO-1.0-Signed-off-by: Keith Derrick <keith.derrick@lge.com>
Change-Id: I411edd2ac1b325ab7d50b509651501640030f805
Reviewed-on: https://g2g.palm.com/3168
Reviewed-by: Build Verification
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Tested-by: Keith Derrick <keith.derrick@lge.com>