rewrite owner when copying FunctionDescriptor from supertype scope

that fixes invocation:

>>> StringBuilder.length()

that was compiled to

>>> invokevirtual CharSequence.length()

and now compiles to

>>> invokevirtual StringBuilder.length()

Essentially patch rewrites FunctionDescriptor.containingDeclaration
when FunctionDescriptor is copied to subclass scope.

FunctionDescriptor now has kind field that can be
* DECLARATION (for "real" function, maybe abstract)
* DELEGATION
* FAKE_OVERRIDE (created for functions from supertypes)

All tests pass although some parts of code are buggy and ugly.

Random comments about this patch:

* FunctionDescriptor.overrides point to function descriptors of supertype scopes

* Filling of memberScope with supertypes is moved to OverrideResolver

* ExpressionCodegen.intermediateValueForProperty must be rewritten

* Patch adds not nice REDECLARATION reports (see compiler/testData/diagnostics/tests/*).
  Will be fixed later.

compiler/testData/diagnostics/tests/LValueAssignment.jet

@@ -12,7 +12,7 @@ class C() : B() {
         this.b = 123
         super.b = 23
         <!VAL_REASSIGNMENT!>this.c<!> = 34
-        super.c = 3535 //repeat for 'c'
+        <!VAL_REASSIGNMENT!>super.c<!> = 3535 //repeat for 'c'
 
         <!VARIABLE_EXPECTED!>getInt()<!> = 12
     }
@@ -140,4 +140,4 @@ fun Array<Int>.checkThis() {
 
 abstract class Ab {
     abstract fun getArray() : Array<Int>
-}
+}