build,windows: clean `lint` paths in vcbuild.bat
- enable eslint to run even in a "clean" workspace
- small improvement in performance by reducing number of calls to
findstr
- document [jslint/jslint-ci] https://github.com/nodejs/node/pull/11856#discussion_r107216161
After #12276 I thought the lint code paths deserved some tweaking
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
build,windows