[clang] [llvm] Support -mnop-mcount and -mrecord-mcount on x86 elf targets. (PR #184641)

[Nikita Popov via cfe-commits]

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nikic wrote:

```suggestion
  if (Attrs.hasFnAttr("mrecord-mcount")) {
```

https://github.com/llvm/llvm-project/pull/184641