patch applied (ghc): configure.ac: fix libm checks (Trac #3730)

[Simon Marlow]

Fri Dec  4 13:40:12 PST 2009  Sergei Trofimovich <slyfox at inbox.ru>
  * configure.ac: fix libm checks (Trac #3730)
  Ignore-this: f3372535a68f3833247f679b023745c8
  
  libbfd pulled libm as dependency and broke LIBM= detection.
  
  Patch moves libm in library tests as early as possible.
  Thanks to asuffield for suggesting such a simple fix.
  Thanks to Roie Kerstein and Renato Gallo for finding
  and tracking down the issue.

    M ./configure.ac -5 +9

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20091204214012-3eaf8-1882af6f6c1563846433faffaecdd678fdff7c5b.gz