style fix, included empty test file to avoid failures

Author: uzairnawaz

libc/src/__support/wchar/mbstate.h

@@ -9,8 +9,8 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_MBSTATE_H
 #define LLVM_LIBC_SRC___SUPPORT_MBSTATE_H
 
-#include "src/__support/common.h"
 #include "hdr/types/char32_t.h"
+#include "src/__support/common.h"
 #include <stdint.h>
 
 namespace LIBC_NAMESPACE_DECL {

libc/test/src/__support/wchar/utf32_to_8_test.cpp

@@ -0,0 +1,15 @@
+//===-- Unittests for the CharacterConverter class (utf32 -> 8) -----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/__support/common.h"
+#include "src/__support/wchar/character_converter.h"
+#include "src/__support/wchar/mbstate.h"
+
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibcCharacterConverterUTF32To8Test, OneByte) {}