gpgme: error in OS X app bundle

[Robert J. Hansen]

> Is there another directory which should be included into the default
> PATH on macOS?  We can't add private directories  (that is for what PATH
> is used for), but adding standard directories would be fine.

Well, the problem we run into is there's so many different places people
install GnuPG on OS X.

Homebrew uses /usr/local, GPGTools uses /usr/local, GPGOSX uses
/usr/local/gnupg-2.1, hand-installed often goes to $HOME, some people
use /opt, and so on.

I have a hack around it, but it's kind of gross, and I'm really hoping
there's a better way.