GPGME_DEBUG on Android, which makes env vars hard

[Hans-Christoph Steiner]

So this kind of thing would be super helpful for me to debug the
GnuPG-for-Android app, but since Android apps are Java, and they are
launched from a mysterious non-UNIX process, using environment variables
is difficult at best.

I would like to do exactly this:
GPGME_DEBUG=9:/tmp/gpgme.debug

Is there anyway to do this in C code?  Like an option to the gpg_engine?

.hc