Add test for KT-27140

compiler/testData/codegen/box/inlineClasses/kt27140.kt

@@ -0,0 +1,13 @@
+// !LANGUAGE: +InlineClasses
+// WITH_RUNTIME
+// IGNORE_BACKEND: JVM_IR
+
+inline class Z(private val i: Int) {
+    fun toByteArray() = ByteArray(1) { i.toByte() }
+}
+
+fun box(): String {
+    val z = Z(42)
+    if (z.toByteArray()[0].toInt() != 42) throw AssertionError()
+    return "OK"
+}