package/libgcrypt: security bump version to 1.9.1

Removed patch which was applied upstream.

Release notes:
https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>