Add issues folder in async-await

Author: varkor

src/test/ui/async-await/issues/auxiliary/issue-60674.rs

@@ -0,0 +1,12 @@
+// force-host
+// no-prefer-dynamic
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+use proc_macro::TokenStream;
+
+#[proc_macro_attribute]
+pub fn attr(_args: TokenStream, input: TokenStream) -> TokenStream {
+    println!("{}", input);
+    TokenStream::new()
+}