There are two parts in this change:
1) Previously, we looked up $default methods with the incorrect
signature in supertypes. For example in defaultInSuperClass.kt, we'd
try to find a method foo$default with the signature `(B, String,
String, int, Object)` in the class A. Now we're modifying the array
of parameter types on each step if we're looking for a static
$default method, by assigning its first element to be the containing
class. This fixes cases when defaults come from a superclass.
2) For interfaces, $default methods are actually located in the
corresponding DefaultImpls class. Now we look up that class and
search for the $default method there. Note that this is needed
because of KT-33430. This fixes cases when defaults come from a
superinterface.
#KT-13936 Fixed
Pavel Kunyavskiy