Add tests for overridden variables that are computed or observed

Author: Brian King

test/decl/inherit/override.swift

@@ -9,6 +9,9 @@ class A {
 
   @objc func f3() { } // expected-note{{overridden declaration is here}}
   @objc func f4() -> ObjCClassA { } // expected-note{{overridden declaration is here}}
+  @objc var v1: Int { return 0 } // expected-note{{overridden declaration is here}}
+  @objc var v2: Int { return 0 } // expected-note{{overridden declaration is here}}
+  @objc var v3: Int = 0 // expected-note{{overridden declaration is here}}
 
   dynamic func f3D() { }
   dynamic func f4D() -> ObjCClassA { }
@@ -30,6 +33,15 @@ extension B {
 
   override func f3() { } // expected-error{{cannot override a non-dynamic class declaration from an extension}}
   override func f4() -> ObjCClassB { } // expected-error{{cannot override a non-dynamic class declaration from an extension}}
+  override var v1: Int { return 1 } // expected-error{{cannot override a non-dynamic class declaration from an extension}}
+  override var v2: Int { // expected-error{{cannot override a non-dynamic class declaration from an extension}}
+    get { return 1 }
+    set { }
+  }
+  override var v3: Int { // expected-error{{cannot override a non-dynamic class declaration from an extension}}
+    willSet { }
+    didSet { }
+  }
 
   override func f3D() { }
   override func f4D() -> ObjCClassB { }