Add note on libFuzzer for Windows to release notes

By Jonathan Metzman!

Differential revision: https://reviews.llvm.org/D58676


git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_80@354892 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed