gnupg2 2.0.26

Update to latest stable release, remove obsolete patch, update version
patch, change mirror.
gpg-agent 2.0.26

Update to latest stable release, update patch, add mirror.
gnupg2: update 2.0.26 bottle.
gpg-agent: update 2.0.26 bottle.

Closes #31564.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>