patch applied (cabal): Make configure much less verbose by default and give useful output with -v

[Duncan Coutts]

Thu Aug 16 21:24:14 PDT 2007  Duncan Coutts <duncan at haskell.org>
  * Make configure much less verbose by default and give useful output with -v
  This actually brings it into line with the other commands which do not produce
  much output by default. It is very very quiet by default now though.
  To make the -v output nice we have to lower the verbosity one notch in places.

    M ./Distribution/Simple/Configure.hs -39 +41
    M ./Distribution/Simple/SetupWrapper.hs -1 +1
    M ./Distribution/Verbosity.hs +13