Increase version to 3.8.0

:Release Notes:
New backward-compatible functionality has been implemented.

:Detailed Notes:

:Testing Performed:
Build and unit tests.

:QA Notes:

:Issues Addressed:
[BHV-2977] Create wrappers for the rest of API

Open-webOS-DCO-1.0-Signed-off-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>

Change-Id: I5d23d163bfee1df2af2122ec24546ac2a34338f5
Reviewed-on: https://g2g.palm.com/5355
Reviewed-by: DCO Verification
Reviewed-by: Alexandr Smoktal <alexandr.smoktal@lge.com>
Tested-by: Alexandr Smoktal <alexandr.smoktal@lge.com>