patch applied (ghc): In validate, use gmake if available; based on a patch from Gabor PALI

[Ian Lynagh]

Mon May 17 13:06:54 PDT 2010  Ian Lynagh <igloo at earth.li>
  * In validate, use gmake if available; based on a patch from Gabor PALI

    M ./validate -5 +12

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100517200654-3fd76-b228b48ef75a34869437e5ecf86a97841835c6a5.gz