CMake: fix GLUT library link
CMake: fix GLUT library link

use GLUT_LIBRARIES instead of GLUT::GLUT

Change-Id: I92af90e09e00b01bd050ebeb8e9003b14c7dc144

webmproject/libwebp,PKRoma/libwebp,PKRoma/libwebp,PKRoma/libwebp,webmproject/libwebp,webmproject/libwebp,webmproject/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,PKRoma/libwebp