Migrate boxWithJava tests to multi-file framework

compiler/testData/codegen/boxWithJava/reflection/callInstanceJavaMethod.kt

@@ -0,0 +1,31 @@
+// FILE: J.java
+
+public class J {
+    private final int param;
+
+    public J(int param) {
+        this.param = param;
+    }
+
+    public String foo(int[] arr, Object[] arr2, Integer y) {
+        return "" + param + arr[0] + arr2[0] + y;
+    }
+}
+
+// FILE: K.kt
+
+import kotlin.reflect.jvm.*
+import kotlin.test.assertEquals
+
+fun box(): String {
+    val f = J::foo
+    assertEquals(
+            listOf(J::class.java, IntArray::class.java, Array<Any>::class.java, Integer::class.java),
+            f.parameters.map { it.type.javaType }
+    )
+    assertEquals(String::class.java, f.returnType.javaType)
+
+    assertEquals("01A2", f.call(J(0), intArrayOf(1), arrayOf("A"), 2))
+
+    return "OK"
+}