TEST: primary/secondary constructor fields initialization

backend.native/tests/codegen/object/fields1.kt

@@ -0,0 +1,8 @@
+class B(val a:Int, b:Int) {
+    constructor(pos:Int):this(1, pos) {}
+    val pos = b + 1
+}
+
+fun primaryConstructorCall(a:Int, b:Int) = B(a, b).pos
+
+fun secondaryConstructorCall(a:Int) = B(a).pos