modules: EGL is not Sdl2Application dependency on WebGL.

modules/FindMagnum.cmake

@@ -394,8 +394,8 @@ foreach(component ${Magnum_FIND_COMPONENTS})
                 unset(MAGNUM_${_COMPONENT}_LIBRARY)
             endif()
 
-            # Find also EGL library, if on ES
+            # Find also EGL library, if on ES (and not on WebGL)
-            if(MAGNUM_TARGET_GLES AND NOT MAGNUM_TARGET_DESKTOP_GLES)
+            if(MAGNUM_TARGET_GLES AND NOT MAGNUM_TARGET_DESKTOP_GLES AND NOT MAGNUM_TARGET_WEBGL)
                 find_package(EGL)
                 if(EGL_FOUND)
                     list(APPEND _MAGNUM_${_COMPONENT}_LIBRARIES ${EGL_LIBRARY})