Add freeglut as library name (#10031)

Thanks to Thomas Sondergaard for the patch in the bug report.

Modules/FindGLUT.cmake

@@ -23,7 +23,7 @@
 IF (WIN32)
   FIND_PATH( GLUT_INCLUDE_DIR NAMES GL/glut.h 
     PATHS  ${GLUT_ROOT_PATH}/include )
-  FIND_LIBRARY( GLUT_glut_LIBRARY NAMES glut glut32
+  FIND_LIBRARY( GLUT_glut_LIBRARY NAMES glut glut32 freeglut
     PATHS
     ${OPENGL_LIBRARY_DIR}
     ${GLUT_ROOT_PATH}/Release