deps: backport b444da41 from V8's upstream
Original commit message:
[es6] support `get` and `set` in shorthand properties
Add support for `get` and `set` as shorthand properties. Also
supports them for CoverInitializedName in BindingPatterns and (once implemented)
AssignmentPatterns.
BUG=v8:4412, v8:3584
LOG=N
R=adamk, aperez, wingo, rossberg
Review URL: https://codereview.chromium.org/1328083002
Cr-Commit-Position: refs/heads/master@{#30769}
Fixes: https://github.com/nodejs/node/issues/4237
cc @nodejs/v8 @mscdex