Nuke some arch-tags
Patches applied:

 * stuart.bishop@canonical.com/launchpad--devel--0--patch-390
   Merge from Rocketfuel

 * stuart.bishop@canonical.com/launchpad--devel--0--patch-391
   Merge from Rocketfuel and disolve cornflakes

 * stuart.bishop@canonical.com/launchpad--devel--0--patch-392
   Nuke some arch-tags

 * stuart.bishop@canonical.com/launchpad--devel--0--patch-393
   Nuke some arch-tags

 * stuart.bishop@canonical.com/launchpad--devel--0--patch-394
   Nuke arch-tags