security/1password-client: Handle re-rolled distfiles.
apparently AgileBits re-rolled the dist files on 2018-06-01.

pkg-fallout notified me that it couldn't download the i386 version, but I
was able to. Checking the distfiles checksums on directly downloaded files
showed the attached changes.

I did re-verify the included gpg signatures, and they are good.

I'm also adding a local mirror on general principles.

Reported by: pkg-fallout