resolve: Filter away macro prelude in modules with #[no_implicit_prelude] on 2018 edition

src/test/ui/hygiene/no_implicit_prelude-2018.rs

@@ -0,0 +1,11 @@
+// edition:2018
+
+#[no_implicit_prelude]
+mod bar {
+    fn f() {
+        ::std::print!(""); // OK
+        print!(); //~ ERROR cannot find macro `print!` in this scope
+    }
+}
+
+fn main() {}

src/test/ui/hygiene/no_implicit_prelude-2018.stderr

@@ -0,0 +1,10 @@
+error: cannot find macro `print!` in this scope
+  --> $DIR/no_implicit_prelude-2018.rs:7:9
+   |
+LL |         print!(); //~ ERROR cannot find macro `print!` in this scope
+   |         ^^^^^
+   |
+   = help: have you added the `#[macro_use]` on the module/import?
+
+error: aborting due to previous error
+

src/test/ui/hygiene/no_implicit_prelude.rs

@@ -21,7 +21,10 @@ mod bar {
         Vec::new(); //~ ERROR failed to resolve
         ().clone() //~ ERROR no method named `clone` found
     }
-    fn f() { ::foo::m!(); }
+    fn f() {
+        ::foo::m!();
+        println!(); // OK on 2015 edition (at least for now)
+    }
 }
 
 fn main() {}