[DO NOT MERGE] Ignore tests/ui/traits/fn-pointer/bare-fn-no-impl-fn-ptr-99875.rs on Windows

Author: jieyouxu

tests/ui/traits/fn-pointer/bare-fn-no-impl-fn-ptr-99875.rs

@@ -1,3 +1,6 @@
+//@ ignore-windows
+// FIXME: compiletest path normalization bug
+
 struct Argument;
 struct Return;