Value classes: treat @JvmInline value classes as inline classes

Report error on value classes without @JvmInline annotation.
Do not check for @JvmInline annotation in value classes since
it breaks reflection.

compiler/psi/src/org/jetbrains/kotlin/psi/KtClass.kt

@@ -33,6 +33,7 @@ open class KtClass : KtClassOrObject {
     fun isSealed(): Boolean = hasModifier(KtTokens.SEALED_KEYWORD)
     fun isInner(): Boolean = hasModifier(KtTokens.INNER_KEYWORD)
     fun isInline(): Boolean = hasModifier(KtTokens.INLINE_KEYWORD)
+    fun isValue(): Boolean = hasModifier(KtTokens.VALUE_KEYWORD)
 
     override fun getCompanionObjects(): List<KtObjectDeclaration> = body?.allCompanionObjects.orEmpty()