[clang] [llvm] [clang] Add `-verify-directives` cc1 flag (PR #179835)

[Vlad Serebrennikov via cfe-commits]

================
@@ -3451,22 +3451,40 @@ are similar.
 Testing
 -------
 All functional changes to Clang should come with test coverage demonstrating
-the change in behavior.
+the change in behavior. There are four kinds of such tests.
+
+The first kind is unit tests. Such tests are placed in ``clang/test/unittest``.
----------------
Endilll wrote:

This should be fixed now

https://github.com/llvm/llvm-project/pull/179835