[llvm] [Runtimes] Merge 'compile_commands.json' files from runtimes build (PR #116303)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> I don't feel particularly qualified to accept or reject the changes, but they seem plausible to me FWIW.

No problem, I think this is fairly innocuous as-is, unless people are really concerned about a few extra MB of JSON. I've personally gotten really tired of doing this manually every time CMake reconfigured.

https://github.com/llvm/llvm-project/pull/116303