bug#36287: 26.2.90; On macOS, process-attributes returns truncated command name

[Xu Chunyang]

(alist-get 'comm (process-attributes 45329))
;; => "Google Chrome He"

But the command name is actually 'Google Chrome Helper' as the following
shows

~ $ ps -p 45329
  PID TTY           TIME CMD
45329 ??         8:15.90 /Applications/Google 
Chrome.app/Contents/Frameworks/Google Chrome 
Framework.framework/Versions/75.0.3770.100/Helpers/Google Chrome 
Helper.app/Contents/MacOS/Google Chrome Helper --type=gpu-process 
--field-trial-handle=1718379636,16071315400300348740,16333828044400969087,131072
 
--gpu-preferences=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
 --service-request-channel-token=12474817198730077840
~ $

In GNU Emacs 26.2.90 (build 1, x86_64-apple-darwin18.6.0, Carbon Version 158 
AppKit 1671.5)
 of 2019-06-13 built on Chunyangs-MacBook-Air.local
Repository revision: 7ba854289bd169f1e5f4fbdbc4ae2bef24b9811f
Windowing system distributor 'Apple Inc.', version 10.14.5