SI-7492 Make scala.runtime.MethodCache private[scala]
SI-7492 Make scala.runtime.MethodCache private[scala]

These are internal implementation details which shouldn't be exposed
to users (and might go away when support for invokedynamic is added).

shimib/scala,felixmulder/scala,scala/scala,scala/scala,shimib/scala,slothspot/scala,martijnhoekstra/scala,scala/scala,felixmulder/scala,felixmulder/scala,jvican/scala,felixmulder/scala,shimib/scala,martijnhoekstra/scala,slothspot/scala,lrytz/scala,martijnhoekstra/scala,jvican/scala,jvican/scala,lrytz/scala,shimib/scala,martijnhoekstra/scala,lrytz/scala,lrytz/scala,slothspot/scala,jvican/scala,shimib/scala,slothspot/scala,felixmulder/scala,martijnhoekstra/scala,shimib/scala,jvican/scala,martijnhoekstra/scala,felixmulder/scala,jvican/scala,lrytz/scala,jvican/scala,scala/scala,slothspot/scala,felixmulder/scala,scala/scala,scala/scala,lrytz/scala,slothspot/scala,slothspot/scala