test: add test for double_negations with macto

Author: anatawa12

tests/ui/lint/lint-double-negations-macro.rs

@@ -0,0 +1,10 @@
+//@ check-pass
+macro_rules! neg {
+    ($e: expr) => {
+        -$e
+    };
+}
+
+fn main() {
+    neg!(-1);
+}