Move /src/test to /tests

tests/codegen-units/item-collection/unreferenced-inline-function.rs

@@ -0,0 +1,11 @@
+// compile-flags:-Zprint-mono-items=lazy
+
+// N.B., we do not expect *any* monomorphization to be generated here.
+
+#![deny(dead_code)]
+#![crate_type = "rlib"]
+
+#[inline]
+pub fn foo() -> bool {
+    [1, 2] == [3, 4]
+}