patch applied (cabal): allow underscores in arch names

Wed Mar 26 09:59:12 PDT 2008 Ross Paterson <ross@soi.city.ac.uk> * allow underscores in arch names Stops it barfing on arch(x86_64). M ./Distribution/System.hs -1 +2 View patch online: http://darcs.haskell.org/cabal/_darcs/patches/20080326165912-b47d3-08d7ea8f4...