add test

Author: Alef-gabriel

tests/ui/parser/bad-await-body.rs

@@ -0,0 +1,4 @@
+fn main() {
+    await{}()
+    //~^   ERROR: cannot find struct, variant or union type `await` in this scope
+}

tests/ui/parser/bad-await-body.stderr

@@ -0,0 +1,9 @@
+error[E0422]: cannot find struct, variant or union type `await` in this scope
+  --> $DIR/bad-await-body.rs:2:5
+   |
+LL |     await{}()
+   |     ^^^^^ not found in this scope
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0422`.