[SDL 0046] Implement logger abstraction

[theresalech]

Proposal: Implement logger abstraction

The good abstraction for the logger allows to easily substitute the logger library from one to another in the case of necessity. The different system has different logging mechanism and SDL has to be easily integrated to use any logger library as a background sink.

Review: smartdevicelink/sdl_evolution#141

[jordynmackool]

It was determined no update needed for Manticore. Core adds the possibility of custom loggers, but the existing logger has not changed.