fs.futimes causes gulp build failure on AIX 6

[just-dont]

node -v
8.11.4

gulp
@4.0.0

See nodejs/node#12609. This causes the following error with gulp on any gulp.dest():

Error: ENOSYS: function not implemented, futime

Currently I'm using a monkeypatch to ignore fs.futimes ENOSYS errors in lib/file-operations.js, but I'm not exactly sure if it's a proper enough solution.