patch applied (ghc): Remove libHSrtsmain.a before creating it

[Ian Lynagh]

Sat Jul 31 17:54:32 PDT 2010  Ian Lynagh <igloo at earth.li>
  * Remove libHSrtsmain.a before creating it
  Otherwise it isn't updated properly if rts/Main.c changes

    M ./rts/ghc.mk +1

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100801005432-3fd76-f65048781f863d9ac6ac91b63df612d032563b78.gz