Move /src/test to /tests

tests/debuginfo/lexical-scope-in-parameterless-closure.rs

@@ -0,0 +1,12 @@
+// min-lldb-version: 310
+
+// compile-flags:-C debuginfo=1
+
+// gdb-command:run
+// lldb-command:run
+
+// Nothing to do here really, just make sure it compiles. See issue #8513.
+fn main() {
+    let _ = ||();
+    let _ = (1_usize..3).map(|_| 5);
+}