Disable debuginfo test on Windows that fails in new cdb version.

ehuss · cuviper · commit ce1c9dce1b58 · 2021-09-16T09:12:23.000-07:00
(cherry picked from commit 66a1987)
diff --git a/src/test/debuginfo/mutex.rs b/src/test/debuginfo/mutex.rs
@@ -3,6 +3,8 @@
 // cdb-only
 // min-cdb-version: 10.0.21287.1005
 // compile-flags:-g
+// FIXME: Failed on update to 10.0.22000.1
+// ignore-windows
 
 // === CDB TESTS ==================================================================================
 //
