[clang] docs(clang): add some missing flags (PR #209519)

[Ehren Bendler via cfe-commits]

================
@@ -239,4 +257,3 @@ Detailed Usage
 ~~~~~~~~~~~~~~
 
 For extended documentation please refer to the `official site of CodeChecker <https://github.com/Ericsson/codechecker/blob/master/docs/usage.md>`_!
-
----------------
ebendler wrote:

removed

https://github.com/llvm/llvm-project/pull/209519