The only place where their get/set methods were used was in
KPropertyNImpl.Getter.invoke, and it's fine if that results in a reflective
call instead (KPropertyN#getter is not available without kotlin-reflect.jar
anyway). The test data has been changed because a package local Java field is
not accessible via reflection
Generation of callable reference's signature in codegen should use the same
mechanism for obtaining the signature as the runtime in RuntimeTypeMapper,
namely DescriptorUtils.unwrapFakeOverride(...).original
#KT-13700 Fixed
Zalim Bashorov