Add some tests on Java property references

compiler/testData/codegen/boxWithJava/reflection/javaStaticField/K.kt

@@ -0,0 +1,12 @@
+import kotlin.test.assertEquals
+
+fun box(): String {
+    val f = J::x
+    assertEquals("x", f.name)
+
+    f.set("OK")
+    assertEquals("OK", J.x)
+    assertEquals("OK", f.getter())
+
+    return f.get()
+}