Fix for-in iterator over array of boxed inline class values

#KT-25324 Fixed

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

@@ -0,0 +1,16 @@
+// !LANGUAGE: +InlineClasses
+// WITH_RUNTIME
+// IGNORE_BACKEND: JVM_IR
+// IGNORE_BACKEND: JS_IR
+
+inline class Foo(val arg: Int)
+
+fun box(): String {
+    val arr = arrayOf(Foo(1), Foo(2))
+    var sum = 0
+    for (el in arr) {
+        sum += el.arg
+    }
+
+    return if (sum != 3) "Fail" else "OK"
+}

compiler/testData/codegen/box/unsignedTypes/iterateOverArrayOfUnsignedValues.kt

@@ -0,0 +1,21 @@
+// WITH_UNSIGNED
+// IGNORE_BACKEND: JVM_IR
+// IGNORE_BACKEND: JS_IR
+
+fun box(): String {
+    var sum = 0u
+    for (el in arrayOf(1u, 2u, 3u)) {
+        sum += el
+    }
+
+    if (sum != 6u) return "Fail 1"
+
+    sum = 0u
+    for (el in uintArrayOf(10u, 20u)) {
+        sum += el
+    }
+
+    if (sum != 30u) return "Fail 2"
+
+    return "OK"
+}