update arch deps

sparc no longer supports yesod (and is probably not going to be a release
arch anyway)

tasty is now built on mipsel.
Merge branch 'master' of ssh://git-annex.branchable.com
Merge branch 'master' of ssh://git-annex.branchable.com
fix build
Merge branch 'master' of ssh://git-annex.branchable.com