auto merge of #8573 : mrordinaire/rust/struct-new-as-field-name, r=alexcrichton

fix for #8088, along with a test.

src/test/compile-fail/obsolete-syntax.rs

@@ -13,8 +13,6 @@ struct s {
     //~^ ERROR obsolete syntax: `let` in field declaration
     bar: ();
     //~^ ERROR obsolete syntax: field declaration terminated with semicolon
-    new() { }
-    //~^ ERROR obsolete syntax: struct constructor
 }
 
 struct q : r {

src/test/run-pass/struct-new-as-field-name.rs

@@ -0,0 +1,8 @@
+struct Foo {
+    new: int,
+}
+
+pub fn main() {
+    let foo = Foo{ new: 3 };
+    assert_eq!(foo.new, 3);
+}