[libc][Obvious] Fix typos

## Rationale

The goal here is to satisfy the [Benchmarking

Principles](https://en.wikipedia.org/wiki/Benchmark_\(computing\)#Benchmarking_Principles).

Principles](https://en.wikipedia.org/wiki/Benchmark_(computing)#Benchmarking_Principles).

1.  **Relevance**: Benchmarks should measure relatively vital features.

2.  **Representativeness**: Benchmark performance metrics should be broadly

7.  **Transparency**: Benchmark metrics should be easy to understand.

Benchmarking is a [subtle

art](https://en.wikipedia.org/wiki/Benchmark_\(computing\)#Challenges) and

art](https://en.wikipedia.org/wiki/Benchmark_(computing)#Challenges) and

benchmarking memory functions is no exception. Here we'll dive into

peculiarities of designing good microbenchmarks for `llvm-libc` memory

functions.

is always set to `performance`. We also want to make sure that the time based

events are not impacted by frequency scaling.**

See [REAME.md](REAME.md) on how to set this up.

See [README.md](README.md) on how to set this up.

### Reserved and pinned cores

private:

  // Copies `kSize` bytes from `src` to `dst` using a for loop.

  // This code requires the use of `-fno-buitin-memcpy` to prevent the compiler

  // This code requires the use of `-fno-builtin-memcpy` to prevent the compiler

  // from turning the for-loop back into `__builtin_memcpy`.

  static void ForLoopCopy(char *__restrict dst, const char *__restrict src) {

    for (size_t i = 0; i < kSize; ++i)