lld-link: Mention comdat selection work in the 9.0.0 wip release notes

Differential Revision: https://reviews.llvm.org/D58301


git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@354241 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 0b3cee5..7b6dbdf 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -29,6 +29,9 @@
 COFF Improvements
 -----------------
 
+* lld-link now correctly reports duplicate symbol errors for obj files
+  that were compiled with /Gy.
+
 * ...
 
 MinGW Improvements