move dummy test module to auxiliary directory

src/test/ui/modules/auxiliary/dummy_lib.rs

@@ -0,0 +1,2 @@
+#[allow(dead_code)]
+pub struct Dummy;

src/test/ui/modules/dummy.rs

@@ -1 +0,0 @@
-pub struct Dummy;

src/test/ui/modules/special_module_name_ignore.rs

@@ -1,9 +1,9 @@
 // run-pass
 
-#[path = "dummy.rs"]
+#[path = "auxiliary/dummy_lib.rs"]
 mod lib;
 
-#[path = "dummy.rs"]
+#[path = "auxiliary/dummy_lib.rs"]
 mod main;
 
 fn main() {}