Custom annotations not working in Kotlin

I'm trying to use custom annotations on top-level methods in Kotlin. Unfortunately, they don't work. No `DeepLinkEntry`s are generated for them. Only if I annotate at least one static method in a Java class too the correct `DeepLinkEntry`s are generated.

My custom annotation looks like this:
```
@DeepLinkSpec(prefix = arrayOf("http://myapp.com", "https://myapp.com", "myapp://"))
annotation class WebAndAppLink(vararg val value: String)
```
and the annotated top-level method looks like this:
```
@WebAndAppLink("/main")
fun main(context: Context): Intent {
return MainActivity.getIntent(context)
}
```

Reproduce the issue with the shown DeepLinkSpec, WebAndAppLink annotation, and Kotlin top-level main method, first checking annotation processing when no Java static method is present. Trace generation of DeepLinkEntry entries and verify that the Kotlin annotation alone produces the expected entries without requiring a Java class.

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