Migrate boxWithJava tests to multi-file framework

compiler/testData/codegen/boxWithJava/secondaryConstructors/withPrimary.kt

@@ -0,0 +1,40 @@
+// FILE: WithPrimary.java
+
+class WithPrimary {
+    public static A test1() {
+        return new A("123", "abc");
+    }
+    public static A test2() {
+        return new A();
+    }
+    public static A test3() {
+        return new A("123", 456);
+    }
+    public static A test4() {
+        return new A(1.0);
+    }
+}
+
+// FILE: WithPrimary.kt
+
+class A(val x: String = "def_x", val y: String = "1") {
+    constructor(x: String, y: Int): this(x, y.toString()) {}
+    constructor(x: Double): this(x.toString(), "def_y") {}
+    override fun toString() = "$x#$y"
+}
+
+fun box(): String {
+    val test1 = WithPrimary.test1().toString()
+    if (test1 != "123#abc") return "fail1: $test1"
+
+    val test2 = WithPrimary.test2().toString()
+    if (test2 != "def_x#1") return "fail2: $test2"
+
+    val test3 = WithPrimary.test3().toString()
+    if (test3 != "123#456") return "fail3: $test3"
+
+    val test4 = WithPrimary.test4().toString()
+    if (test4 != "1.0#def_y") return "fail4: $test4"
+
+    return "OK"
+}