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

[Mingming Liu via llvm-commits]

================

----------------
minglotus-6 wrote:

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

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