JVM_IR: skip private declarations in imported classes

compiler/testData/codegen/boxAgainstJava/enum/nameConflict.kt

@@ -0,0 +1,19 @@
+// FILE: C.java
+public enum C {
+    OK(0);
+
+    private final int ordinal;
+
+    C(int ordinal) { this.ordinal = ordinal; }
+
+    public int getOrdinal() { return ordinal; }
+}
+
+// FILE: 1.kt
+fun box(): String {
+    val ok = C.OK
+    return when (ok) {
+        C.OK -> "OK"
+        else -> "fail"
+    }
+}