Create SyntheticMemberDescriptor interface

Implement this interface by sam adapters/constructors and use it in navigation

 #KT-11708 Fixed

idea/idea-core/src/org/jetbrains/kotlin/idea/core/KotlinIndicesHelper.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * Copyright 2010-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -288,7 +288,7 @@ class KotlinIndicesHelper(
                     // SAM-adapter
                     container.staticScope.getContributedFunctions(descriptor.name, NoLookupLocation.FROM_IDE)
                             .filterIsInstance<SamAdapterDescriptor<*>>()
-                            .firstOrNull { it.originForSam.original == descriptor.original }
+                            .firstOrNull { it.baseDescriptorForSynthetic.original == descriptor.original }
                             ?.let { processor(it) }
                 }
             }