[compiler-rt] [compiler-rt] Avoid generating coredumps when piped to a tool (PR #83701)

[Fangrui Song via llvm-commits]

MaskRay wrote:

Since PR_SET_DUMPABLE has the downside of not working with PTRACE_ATTACH, I agree that setting RLIMIT_CORE is better, and Vitaly's code suggestion looks good.

https://github.com/llvm/llvm-project/pull/83701