util: support SharedArrayBuffer in inspect

[alistairjcbrown]

Checklist

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

Affected core subsystem(s)

util

Description of change

Update inspect utility to support readable output of SharedArrayBuffer object. SharedArrayBuffer is available behind the harmony_sharedarraybuffer v8 flag. See the MDN docs for more details on what a SharedArrayBuffer is.

[yosuke-furukawa]

I think that would be better to merge my fix... #8587

[Fishrock123]

Shouldn't we wait for this feature to become publicly available in V8 first?

[alistairjcbrown]

Looks like #8587 has been updated to be nearly the same as this PR (I've added comments on that PR).

The only thing this PR has extra is an update to a comment in test-util-inspect-simd.js to reference the correct test file, and adding an explicit ArrayBuffer test to test-util-inspect.js. I'll leave it open for the meantime, but it can probably be closed as a dupe.

[jasnell]

For the time being I'll mark this as being blocked on #8587. Thank you!

[jasnell]

Is this still needed?

[TimothyGu]

Looks like everything except for the inspection test for ArrayBuffer was landed in #8587. Support for SIMD.js was deleted from util.format(). Closing this.