When plugins DSL is used, there is no need to
manually generate typesafe accessors for extensions and
conventions (by running `./gradlew kotlinDslAccessorsSnapshot`).
`kotlin-android-extensions-runtime` and `kotlin-android-extensions-compiler`
had `com.google.android:android` as a provided dependency, but
during transition to Kotlin Gradle build the dependency was declared
as `runtime` instead of `compileOnly`.
Alexey Tsvetkov