Add CLEANPATH and CLEANLIB for building clean-base without dependencies

Ghost User
2018-09-29T09:12:18+02:00

Fixes #23; fixes #25.

`CLEANPATH` and `CLEANLIB` are looked at by `clm` to find the compiler and `StdEnv`. Because these were not set, `clm` was still using the locally installed compiler and `StdEnv` (#23), as well as the locally installed linker causing #25.

These changes can probably be ported to the `build.sh` for other platforms, though I cannot test that so I didn't make these changes.