KT-11678 Support navigation from Java source to Kotlin binaries

Introduce LightMemberOriginForCompiledElement which holds logic for finding corresponding decompiled declaration
ByJvmSignatureIndexer stores the required information while building decompiled text

Some are unsolved in this commit:
   - constructors
   - @Jvm* and other unregular generated members
   - annotation methods

 #KT-11678 Fixed

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/kotlin/MemberSignature.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.
@@ -21,7 +21,7 @@ import org.jetbrains.kotlin.serialization.jvm.JvmProtoBuf
 
 // The purpose of this class is to hold a unique signature of either a method or a field, so that annotations on a member can be put
 // into a map indexed by these signatures
-internal data class MemberSignature private constructor(internal val signature: String) {
+data class MemberSignature private constructor(internal val signature: String) {
     companion object {
         @JvmStatic
         fun fromMethod(nameResolver: NameResolver, signature: JvmProtoBuf.JvmMethodSignature): MemberSignature {