timing.h uses the PRId64 macro which is not included in llvm libc yet

Temporary hack until LLVM libc supports inttypes.h print format macros timing.h uses the PRId64 macro which is not included in llvm libc yet Bug: https://github.com/llvm/llvm-project/issues/63317

Temporary hack until LLVM libc supports inttypes.h print format macros timing.h uses the PRId64 macro which is not included in llvm libc yet Bug: https://github.com/llvm/llvm-project/issues/63317