Factor RefC compilation into multiple stages
Factor RefC compilation into multiple stages

Create functions for each of C source code generation, C object file compilation, and compilation of the final executable.

mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm,mmhelloworld/idris-jvm