Restrict PmLogLib to version 3.0+

:Release Notes:
Source code of DB8 now is incompatible with PmLogLib prior to 3.0
version. So lets state it in cmake.

:Detailed Notes:
Without this change project configures without errors on platforms with
PmLogLib 2.x. But during build compiler complains on places related to
PmLog.

:Testing Performed:

:QA Notes:

:Issues Addressed:

Open-webOS-DCO-1.0-Signed-off-by: Nikolay Orliuk <nikolay.orliuk@lge.com>
Change-Id: I718a958414a84d3c0cb57f60a608f0963e5a0da8
Reviewed-on: https://g2g.palm.com/3176
Reviewed-by: Build Verification
Reviewed-by: Roger Stringer <roger.stringer@lge.com>
Tested-by: Roger Stringer <roger.stringer@lge.com>