Fixed wrong owner mapping in presence of -Xmultifile-package-facades. Fixed backing field mapping issue. Added more tests.
with multiple Kotlin source files - bytecodeTextMultifile/partMembersCall, initial import
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)
