doc,win: clarify WSL support
Following the discussion in https://github.com/nodejs/node/issues/13471, this adds a note to BUILDING.md
to clarify WSL support.
cc @nodejs/platform-windows @nodejs/build
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
doc, win