Minor. Add more tests

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

@@ -0,0 +1,20 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class UInt<T: Int>(val value: T)
+
+fun <T> last(vararg e: T): T = e[e.size - 1]
+fun <T> first(vararg e: T): T = e[0]
+
+fun box(): String {
+    val u0 = UInt(0)
+    val us = arrayOf(UInt(1), UInt(2), UInt(3))
+
+    if (last(u0, *us).value != 3) return "fail"
+    if (first(*us, u0).value != 1) return "fail"
+    if (first(u0, *us).value != 0) return "fail"
+
+    return "OK"
+}