json: Put signature info before data output
json: Put signature info before data output

* src/gpgme-json.c (op_decrypt): Move info before data.

--
This should enable it to first parse signatures before
handling very large chunks of data.

gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme