There are multiple bugs related to hsdis, calling both for added simplicity in building, and allowing for multiple backends.

The very first step is getting rid of the stand-alone Makefile and integrate the build using standard build-infra tooling.

This patch does this, and it also contains OOTB building on Windows (as requested in JDK-8208495, and furthermore it lays the foundation for adding more backends to hsdis.