Fix creation of chroots.

Update the pacman configuration by removing the obsoleted "SyncFirst".

Adjust the options used for mkarchroot.

Signed-off-by: Magnus Therning <magnus.therning@hasselblad.com>
Updates 2013-05-21

    ghc-mod
    semigroups

Signed-off-by: Magnus Therning <magnus.therning@hasselblad.com>