Value classes: Generate @JvmInline annotation for inline classes

but not for value classes.
Since inline classes and value classes share the same flag, we use
presence of the annotation to distinguish them.

compiler/testData/codegen/bytecodeListing/inlineClasses/defaultInterfaceMethodsInInlineClass.txt

@@ -17,6 +17,7 @@ public interface IFoo {
     public final inner class IFoo$DefaultImpls
 }
 
+@kotlin.jvm.JvmInline
 @kotlin.Metadata
 public final class L {
     // source: 'defaultInterfaceMethodsInInlineClass.kt'