jacoco/codecov.io fix issues

[soywiz]

Initially tests in jtransc were designed with practicality in mind. Instead of unittest everything I work on case-use tests; in this case integration tests. That make tests less fragile and it is easier to change a design without breaking tests. Jacoco works at per-module. It just tests again classes in its own module by default. That mean that integration tests between projects doesn't measure coverage in other modules.

We have two options here:

• Do proper unittests at each module, and just consider unittesting for coverage
• Tell jacoco to measure coverage in classes of other projects, since codecov is going to merge coverage reports