REVERT cmake changes for freeglut on win32 from r9539 (unfortunately different than on linux...)

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@9544 b7f1a160-662a-0410-a6d8-bea165342f16
FIX: projects generation with cmake

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@9545 b7f1a160-662a-0410-a6d8-bea165342f16