Move test_exceptions_white_list_uncaught into tests/core.

[sbc100]

I'm not sure why this was originally added under tests/third_party but
it looks like a mistake.

[aheejin]

It's because of @kripken's suggestion here: #10720 (comment). But I also think that the program is so simple and I even modified it a bit to make it work with Emscripten, so it can be moved to tests/core. WDYT @kripken?

[sbc100]

Ah.. I see...interesting. I'm not sure it makes sense to have individual tests and expectations under third_party.

[kripken]

I'm fine either way. But I thought @sbc100 you were advocating for tests/third_party in general, which is why I put coremark under there? Are you saying that's just for entire projects but not individual files?

[sbc100]

I do want third party code in general to be in third_party but I would expect any of our test entry points or the .out files to live there. I'm not sure this is a significant enough a piece of code to warrant this separation.