* remove GPGME_CAN_EXPORT_MINIMAL_KEY, upstream now has support for
key export flags in c++ wrapper (gpgmepp >= 1.14)
* therefore, external/gpgmepp/add-minimal-keyexport.patch now fully
obsolete, tweaked xmlsecurity code to use upstream function
* bits of external/gpgmepp/find-libgpg-error-libassuan.patch are
upstream now (configure and makefile pieces, though we keep
configure.ac changes for the while - to not pick up system versions
too easily)
* external/gpgmepp/gpgme.git-fe2892618c20cd40c342cce26ffb6ac4644fd3c3.patch.1
was from upstream anyway, removed
Change-Id: I991c20c0eeff0f9135e97c991afcb905be55a959
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127665
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>