qt: use faster mirror.

Closes #31529.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
leptonica: optionally support gif, webp, openjpeg.

openjpeg was added in 1.71; webp in 1.67; giflib in 1.54

Closes #31534.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
signing-party 1.1.8
signing-party: add 1.1.8 bottle.

Closes #31279.

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