New J2K: add multi-file conversion tests from old j2k

nj2k/testData/multiFile/ToObject/PureUtils.kt

@@ -0,0 +1,10 @@
+package test
+
+object PureUtils {
+    @JvmStatic
+    fun foo1(p: Int) {}
+    @JvmStatic
+    fun foo2(): Int {
+        return 1
+    }
+}