Don't export builtinId of 54 or above.

Change-Id: I5ab651e0c92ab032d892080f979aa4f53295a8b6
bnc#822170: Let's not even try to export invalid chart objects.

If we do, at best, Excel will complain about the document needing
repair.  At worst Excel will skip some of the other valid drawing
objects from being loaded.

Change-Id: If3794d0ae9d8b44b124020bb12b5369dfebc95ae