Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/reified/javaClass.kt

@@ -0,0 +1,14 @@
+// WITH_RUNTIME
+
+import kotlin.test.assertEquals
+
+inline fun<reified T : Any> javaClassName(): String {
+    return T::class.java.getName()
+}
+
+fun box(): String {
+    assertEquals("java.lang.String", javaClassName<String>())
+    assertEquals("java.lang.Integer", javaClassName<Int>())
+    assertEquals("java.lang.Object", javaClassName<Any>())
+    return "OK"
+}