Revert "Make YAML quote forward slashes."

This reverts commit b86c16ad8c97dadc1f529da72a5bb74e9eaed344.

This is being reverted because I forgot to write a useful
commit message, so I'm going to resubmit it with an actual
commit message.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344358 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed