Add missing test file

Author: aschwaighofer

test/SILGen/Inputs/objc_dynamic_replacement.swift

@@ -0,0 +1,19 @@
+import Foundation
+
+@objc protocol Proto {
+  func implicitObjCMethod()
+}
+
+class Object : Proto {
+  func implicitObjCMethod() {}
+
+  @objc dynamic
+  func objCMethod() {}
+
+  @objc dynamic
+  var objcProperty : Int {
+    return 0
+  }
+  @objc dynamic
+  var objcProperty2 : Int = 0
+}