[clang] [clang-tools-extra] [compiler-rt] [PGO] Exposing PGO's Counter Reset and File Dumping APIs (PR #76471)

[Mingming Liu via cfe-commits]

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minglotus-6 wrote:

nit: maybe add a brief description about what this file tests.

https://github.com/llvm/llvm-project/pull/76471