[compiler-rt] [libFuzzer] Fix typos and punctuation in flag descriptions (PR #122619)

[Thurston Dang via llvm-commits]

thurstond wrote:

> LGTM
> 
> I read over the help text and found a few more typos, missing punctuation and grammatical issues, so I pushed a commit addressing them all. @thurstond can you please take another look?

Since you've done a significant amount of additional copyediting - which is great :-) - it probably could have been a separate pull request rather than adding on to this one. But anyway, LGTM, thanks!


https://github.com/llvm/llvm-project/pull/122619