process: trace sync api

[theanarkh]

trace process sync APIs. The example is as follows.

execFileSync('node',['-e','setTimeout(() =>{}, 5000)']);

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

[gengjiawen]

Not sure this triggered coverage failure, cc @bcoe

[gengjiawen]

@nodejs/coverage-admins This is likely a false positive, any idea to fix this ?

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/52925/

[theanarkh]

@jasnell Hi jasnell, Do you know why coverage checks fail, I haven't seen in other PR 🤔️。