clang docs: Be a bit more confident about debug info on Windows.

BUG=82385

Review-Url: https://codereview.chromium.org/2336793002
Cr-Commit-Position: refs/heads/master@{#418081}
diff --git a/docs/clang.md b/docs/clang.md
index d9c818a9..a63ecdb 100644
--- a/docs/clang.md
+++ b/docs/clang.md
@@ -94,9 +94,11 @@
 
 Current brokenness:
 
-*   Debug info is very limited.
 *   To get colored diagnostics, you need to be running
     [ansicon](https://github.com/adoxa/ansicon/releases).
+*   Debug info does now work, but support for it is new.  If you see something
+    not working right, please file a bug and mark it as blocking the
+    [clang/win debug info tracking bug](https://crbug.com/636111).
 
 ## Using a custom clang binary