Fix hex-fiend with chmod go=u

[szhu]

Hex Fiend does not correctly set 'group' and 'other' permissions and will crash if a non-owner runs it. The buggy files are fixed by updating their 'group' and 'other' permissions to reflect the 'user' permissions: chmod go=u.

---

Before this fix:

$ '/opt/homebrew-cask/Caskroom/hex-fiend/2.3.0/Hex Fiend.app/Contents/MacOS/Hex Fiend'
dyld: Library not loaded: @loader_path/../Frameworks/Sparkle.framework/Versions/A/Sparkle
  Referenced from: /opt/homebrew-cask/Caskroom/hex-fiend/2.3.0/Hex Fiend.app/Contents/MacOS/Hex Fiend
  Reason: no suitable image found.  Did find:
    /opt/homebrew-cask/Caskroom/hex-fiend/2.3.0/Hex Fiend.app/Contents/MacOS/../Frameworks/Sparkle.framework/Versions/A/Sparkle: stat() failed with errno=13
    /opt/homebrew-cask/Caskroom/hex-fiend/2.3.0/Hex Fiend.app/Contents/MacOS/../Frameworks/Sparkle.framework/Versions/A/Sparkle: stat() failed with errno=13

$ ll '/opt/homebrew-cask/Caskroom/hex-fiend/2.3.0/Hex Fiend.app/Contents/Frameworks/'
total 0
drwxr-xr-x  6 Administrator   204B Mar  5 03:16 HexFiend.framework/
drwx------  6 Administrator   204B Mar  5 03:16 Sparkle.framework/

[vitorgalvao]

Thank you for the fix — it works great — and specially for contacting the developer. Fixing this upstream would be preferable, naturally.