This also fixes weird suppressions in user code: instead of
«@Suppress("DEPRECATED_SYMBOL_WITH_MESSAGE")» you should now use
«@Suppress("DEPRECATION")»
Reflection types are now considered to be built-in, so their absence means the
runtime is broken and the compiler can't work at all; this condition probably
should be handled on another level for all built-in types
Kirill Rakhman