runtime/race: update syso files with tsan atomics for And/Or

[mauri870]

In order to implement the race variants for the new sync/atomic And/Or operators proposed in #61395 we need to build new syso files as well as implementing these atomic operations for the llvm thread sanitizer.

I already have a patch under review llvm/llvm-project#65695 that adds support for the new functions, but that is still hanging, awaiting to be merged. I would appreciate it if someone with closer ties to llvm could draw the maintainers attention to it.

Once the patch is merged we need to use x/build/cmd/racebuild with llvm HEAD to build the new syso files in runtime/race and commit them.

[mauri870]

@gopherbot add NeedsFix, RaceDetector

[mauri870]

It's worth noting that previous updates to the syso files have caused issues, for example #37485. Since the race runtimes haven't been recompiled for almost a year we need to be careful when doing so.

[gopherbot]

Change https://go.dev/cl/528315 mentions this issue: runtime/internal/atomic: add 386/amd64 And/Or operators

[mauri870]

The upstream llvm support for the and/or tsan operators was cherry picked as llvm/llvm-project@51bfeff, I'll try to move forward with this as soon as I get gomote access.