the encoding in test.c affects the compile failure on Windows OS

Versions in use
JDK: 1.8
OS: Windows 10
Architecture: x86_64

Description of compile failure:
[exec] 正在创建库 ../build/native-win32-x86-64/jnidispatch.lib 和对象 ../build/native-win32-x86-64/jnidispatch.exp
[exec] ../build/native-win32-x86-64/jnidispatch.dll
[exec] /cygdrive/d/work/workspace/jna/jna_0930/jna/native/libffi/msvcc.sh -m64 -W -Wall -Wno-unused -Wno-parentheses -DPSAPI_VERSION=1 -DFFI_BUILDING -DUNICODE -D_UNICODE -DHAVE_PROTECTION -DUSE_STATIC_RTL -I"D:\system\jdk8-64\jdk1.8.0_252\jre/../include" -I"D:\system\jdk8-64\jdk1.8.0_252\jre/../include/win32" -I"D:\work\workspace\jna\jna_0930\jna\build\headers" -I../build/native-win32-x86-64/libffi/include -DJNA_JNI_VERSION='"6.1.5"' -DCHECKSUM='"147a998f0cbc89681a1ae6c0dd121629"' -Wno-unknown-warning-option -Werror -Wno-clobbered -Wno-unused-variable -c testlib.c -o ../build/native-win32-x86-64/testlib.o
[exec] D:/work/workspace/jna/jna_0930/jna/native/testlib.c: error C2220: 警告被视为错误 - 没有生成“object”文件
[exec] D:/work/workspace/jna/jna_0930/jna/native/testlib.c: warning C4819: 该文件包含不能在当前代码页(936)中表示的字符。请将该文件保存为 Unicode 格式以防止数据丢失
[exec] link /DLL /OUT:../build/native-win32-x86-64/testlib.dll ../build/native-win32-x86-64/testlib.o psapi.lib
[exec] Microsoft (R) Incremental Linker Version 14.16.27041.0
[exec] Copyright (C) Microsoft Corporation. All rights reserved.
[exec]
[exec] LINK : fatal error LNK1181: 无法打开输入文件“..\build\native-win32-x86-64\testlib.o”
[exec] make: *** [Makefile:492: ../build/native-win32-x86-64/testlib.dll] Error 157

The Chinese punctuation mark at line 897 in testlib.c affects compilation and causes compilation failure on Windows OS

Open native/testlib.c around line 897 and inspect the Chinese punctuation or other characters that trigger the Windows code-page warning. Reproduce the native build on Windows with the stated JDK and verify that compilation completes without the warning-as-error and produces testlib.o and testlib.dll.