Apply suggestion from @nirbheek

Co-authored-by: Nirbheek Chauhan <nirbheek.chauhan@gmail.com>

Author: lu-zero

src/build_targets.rs

@@ -343,7 +343,7 @@ mod test {
 
         let expected = FileNames {
             static_lib: PathBuf::from("/foo/bar/libferris.a"),
-            shared_lib: PathBuf::from("/foo/bar/ferris.dll"),
+            shared_lib: PathBuf::from("/foo/bar/cygferris.dll"),
             impl_lib: Some(PathBuf::from("/foo/bar/libferris.dll.a")),
             debug_info: None,
             def: Some(PathBuf::from("/foo/bar/ferris.def")),