Each property reference obtained by the '::' operator now causes back-end to
generate an anonymous subclass of the corresponding KProperty class, with the
customized behavior. This fixes a number of issues:
- get/set/name of property references now works without kotlin-reflect.jar in
the classpath
- get/set/name methods are now overridden with statically-generated property
access instead of the default KPropertyImpl's behavior of using Java
reflection, which should be a lot faster
- references to private/protected properties now work without the need to set
'accessible' flag, because corresponding synthetic accessors are generated at
compile-time near the target property
#KT-6870 Fixed
#KT-6873 Fixed
#KT-7033 Fixed
- move some of boxWithStdlib tests under fullJdk/ directory, where they will be
compiled against the full JDK
- introduce FULL_JDK in-text directive for the reflection test as only 4 tests
out of 654 needed the full JDK
