Everything should be fine now.
- I dropped the compiler choices
- BCLANG/PCLANG - this required a dependency on an old llvm37
- So for now, just USE_GCC always [note, with some changes to compiler/main/*hs we could maybe get it to work with base clang as compiler]-
- Use SUB_FILES to create the build.mk file
- Prepare a target to create future bootstrap tarballs
- Note, I did not yet add the SUBDIR += entries for the new ports or add MOVED entries for hs-directory.