- InnerClasses & EnclosingMethod attributes for local classes

in multifile part members
- invocation of multifile part/facade members
(TODO: deserialized descriptor case)
- inlining of multifile part/facade members
(TODO: inline against binaries case)

compiler/testData/codegen/boxWithStdlib/platformNames/multifileClassWithLocalClass.kt

@@ -0,0 +1,11 @@
+@file:JvmName("TestPackage")
+@file:JvmMultifileClass
+package test
+
+fun foo(): String = bar()
+fun bar(): String {
+    class Local(val x: String)
+    return Local("OK").x
+}
+
+fun box(): String = foo()