try to fix the test 2

Author: fengyubiao

native-io/src/main/native-io-jni/cpp/native_io_jni.c

@@ -21,12 +21,15 @@
 #define _GNU_SOURCE
 
 #include <jni.h>
-#include <io.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
+#ifdef _WIN32
+#include <io.h>
+#else
 #include <unistd.h>
+#endif
 
 #include <org_apache_bookkeeper_common_util_nativeio_NativeIOJni.h>