There was no place in bytecode where annotations on properties without backing
fields could be stored to. Now they're written on a synthetic empty void method
with a special name ("propertyName$annotations").
(Annotations on properties cannot simply be written on getters in bytecode,
since a getter can have annotations of its own.)
Test data should be a Kotlin source file with zero or more comments e.g. of
the form: '// 1 INVOKEVIRTUAL'. The test then checks that the generated
bytecode for this file contains exactly one occurrence of the string
'INVOKEVIRTUAL'
