Disable async encryption in GpgOL again

* patches/gpgol/0001-Enable-sync-encryption-again.patch: New.

There is a regression risk that async encryption might lead
to new issues so its better to keep the old blocking way and
not to risk anything in the stable branch of Gpg4win.

(partially cherry picked from commit
e62daa2720b88d4a30a3c2722e9a0ccd32ca7b8d)

• GnuPG-Bug-Id: T5485