Provide commandline arg for logger output in non-debug builds

[jez9999]

At the moment there's an #ifdef DEBUG determining whether you see logger output, but it could be useful to see this output even in non-debug builds, such as if glsmac can't detect SMAC and you want to see which files it couldn't find. There should additionally be a commandline arg that lets you add those loggers even in a non-debug build.

[afwbkbc]

In final game logs will be outputted within game itself (via Quake-like in-game console on `) so no need to look at console where game was launched from (btw it won't even exist on Windows where people just double-click to run).
However, in case of errors it should show errors properly in Release, I'll fix that.