Added lib64 to grass search path

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@15657 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: timlinux

cmake/FindGRASS.cmake

@@ -44,7 +44,7 @@ ENDMACRO (CHECK_GRASS)
 # search for grass installations
 
 # list of paths which to search - user's choice as first
-SET (GRASS_PATHS ${GRASS_PREFIX} /usr/lib/grass c:/msys/local /opt/grass $ENV{GRASS_PREFIX})
+SET (GRASS_PATHS ${GRASS_PREFIX} /usr/lib/grass /usr/lib64/grass64 c:/msys/local /opt/grass $ENV{GRASS_PREFIX})
 
 # mac-specific path
 IF (APPLE)