msvc: Ignore extern-pass-empty on MSVC

The MSVC compiler doesn't like empty structs, so this test won't link on MSVC,
so it's ignored.

src/test/run-pass/extern-pass-empty.rs

@@ -11,6 +11,7 @@
 // Test a foreign function that accepts empty struct.
 
 // pretty-expanded FIXME #23616
+// ignore-msvc
 
 struct TwoU8s {
     one: u8,