patch applied (ghc): fix up libm detection and use (#3724)

[Simon Marlow]

Wed Dec 16 03:36:52 PST 2009  Simon Marlow <marlowsd at gmail.com>
  * fix up libm detection and use (#3724)
  Ignore-this: 6bbdd7302b262ac3b8ddc5c852dc538

    M ./configure.ac -5 +2
    M ./mk/config.mk.in -3
    M ./rts/package.conf.in -1 +4

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20091216113652-12142-b0b084cff75b3e7ded67dc839631b53f8ea9b4fb.gz