The example should output "Hello from Rust!" (#1931)

* Make console output "Hello from Rust!"

The HTML says the console would output Hello from Rust!, but instead it outputs Hello, World!
This is a proposed fix.

* Output "Hello from Rust!"

The HTML says the console would output "Hello from Rust!" but instead it outputs "Hello, World!".
This is a proposed fix.

Author: fbitti

examples/import_js/crate/defined-in-js.js

@@ -1,5 +1,5 @@
 export function name() {
-    return 'World';
+    return 'Rust';
 }
 
 export class MyClass {

examples/import_js/crate/src/lib.rs

@@ -26,7 +26,7 @@ extern "C" {
 
 #[wasm_bindgen(start)]
 pub fn run() {
-    log(&format!("Hello, {}!", name()));
+    log(&format!("Hello from {}!", name())); // should output "Hello from Rust!"
 
     let x = MyClass::new();
     assert_eq!(x.number(), 42);