The Android configure script throws an unhelpful error message telling
the user that `toolchain_path` is not defined when the script is run on
an unsupported host OS, exit with a more helpful message instead while
listing the supported host OSes.
PR-URL: https://github.com/nodejs/node/pull/52882
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>