merge die-macro tests into panic-macro-basic.rs

Author: cyrgani

tests/ui/macros/die-macro-2.rs

@@ -1,7 +1,14 @@
 //@ run-fail
 //@ error-pattern:test
 //@ needs-subprocess
+// Just testing that panic!() type checks in statement or expr
 
-fn main() {
+fn f() {
     let __isize: isize = panic!("test");
+
+    panic!();
+}
+
+fn main() {
+    f();
 }