Cleanup: Move more cmake library variables to be advanced

I noticed that there were a few variables that should not be visible per default.
It seems to me to simply be an oversight, so I went ahead and cleaned them up.

Reviewed By: Sybren, Ray molenkamp

Differential Revision: http://developer.blender.org/D14132

build_files/cmake/Modules/FindOpenImageDenoise.cmake

@@ -110,6 +110,7 @@ ENDIF()
 
 MARK_AS_ADVANCED(
   OPENIMAGEDENOISE_INCLUDE_DIR
+  OPENIMAGEDENOISE_LIBRARY
 )
 
 FOREACH(COMPONENT ${_openimagedenoise_FIND_COMPONENTS})