Feature: add version_target setting to Featureless Make and FLL generate script

Feature: add version_target setting to Featureless Make and FLL generate script

I noticed that I had a different linker version string between Featureless Make and the FLL generate script.
After reviewing and fixing, I decided to make this a customizable option now called version_target.
The default, traditional behavior, is to use only the major version.

A major version target would link like "-Wl,-soname,libfake.so.0".
A minor version target would link like "-Wl,-soname,libfake.so.0.5".
A micro version target would link like "-Wl,-soname,libfake.so.0.5.0".