gnupg2 2.0.25

Update to latest stable release, update patch.
gpg-agent 2.0.25

Update to latest stable release, update patch.
gnupg2: use npth instead of pth

Use the newer npth library that GnuPG has migrated to.

Closes #30580.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
dirmngr: add 1.1.1_1 bottle.
gnupg2: add 2.0.25 bottle.
gpg-agent: add 2.0.25 bottle.
libksba: add 1.3.0 bottle.
npth: add 0.91 bottle.
pinentry: add 0.8.3 bottle.