Test call-conv-field fails on macOS

[upsuper]

On macOS, I get:

diff --git a/tests/expectations/tests/call-conv-field.rs b/tests/expectations/tests/call-conv-field.rs
index d6aa9e4..7b03961 100644
--- a/tests/expectations/tests/call-conv-field.rs
+++ b/tests/expectations/tests/call-conv-field.rs
@@ -37,6 +37,6 @@ impl Default for JNINativeInterface_ {
     fn default() -> Self { unsafe { ::std::mem::zeroed() } }
 }
 extern "stdcall" {
-    #[link_name = "_bar@0"]
+    #[link_name = "bar@0"]
     pub fn bar();
 }

[emilio]

Yeah, this is known. It's about this bit of code, which assumes host_os == target_os, which isn't true for that test.

[emilio]

I've submitted https://reviews.llvm.org/D32389 to make this fixable.