src: fix code coverage cleanup

In https://github.com/nodejs/node/pull/17987 which updated
the location of the code coverage patches I missed a few
changes needed to properly clean up for code coverage.  Add
these.

PR-URL: https://github.com/nodejs/node/pull/18081


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: James M Snell <jasnell@gmail.com>