Revert "Makefile: Update toolchain location"

This reverts commit a77469051a01967b234a685a50b0a04d6d7f2940.
Revert "Scripts: Update COMPILE_BY/HOST"

This reverts commit daedbfcb3be1ee7a2396f7427e411850c9bbaba9.
Revert "Hardcode the host name, stupid OSX was adding .local to the host string, so we kick him in its nuts."

This reverts commit 8e1d80c1428af1c37fda8ae6d1f1d6352837431b.