Update description

Author: alemart

CMakeLists.txt

@@ -101,9 +101,9 @@ ENDIF()
 
 # OpenGL ES
 IF(ANDROID)
-  OPTION(WANT_GLES "Use OpenGL ES" ON)
+  OPTION(WANT_GLES "Use OpenGL ES (Android and X11)" ON)
 ELSE()
-  OPTION(WANT_GLES "Use OpenGL ES" OFF)
+  OPTION(WANT_GLES "Use OpenGL ES (Android and X11)" OFF)
 ENDIF()
 IF(WANT_GLES)
   LIST(APPEND DEFS "WANT_GLES=1")