This adds logic for testing the new license generation functionality.
This is done by having the expected license for a variety of
tests that use different dependencies, and then comparing that against
the license QB64-PE actually produces when compiling these test files.
Note that because the actual used dependencies changes depending upon
the OS, we have separate expected licenses for each of Linux, Windows,
and Mac OS. This required some build changes to accomidate, in addition
to the testing logic changes themselves.
These tests check that we can compile programs that use a variety of
different sets of dependencies. Each program will only be compiled with
the set of dependencies it relies on.