Update win_logger.cc : assert failed when return value not checked. (-DROCKSDB_ASSERT_STATUS_CHECKED) (#7955)

Summary:
Ignore return value on WinLogger::CloseInternal() when build with -DROCKSDB_ASSERT_STATUS_CHECKED on windows.

It's a good way to ignore check here?

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7955

Reviewed By: jay-zhuang

Differential Revision: D26524145

Pulled By: ajkr

fbshipit-source-id: f2f643e94cde9772617c68b658fb529fffebd8ce

port/win/win_logger.cc

@@ -56,7 +56,7 @@ void WinLogger::DebugWriter(const char* str, int len) {
   }
 }
 
-WinLogger::~WinLogger() { CloseInternal(); }
+WinLogger::~WinLogger() { CloseInternal().PermitUncheckedError(); }
 
 Status WinLogger::CloseImpl() {
   return CloseInternal();