Bump AUR to 2.6.1

[kageurufu]

This includes adding the LICENSE to pam-python, thanks to @Giannie for that

This does supersede #472, and matches what is current on the AUR

[boltgolt]

Thanks! Wouldn't it be a good idea to also add pam as a dependency (d253522) as suggested in #472?

[kageurufu]

I was assuming pam was part of the base metapackage, but it looks like its a transitive dependency. I'll add it to pam-python

[boltgolt]

Thanks a lot!