Fix compilation with USE_HDFS (#5444)

Summary:
The changes in https://github.com/facebook/rocksdb/commit/8272a6de57ed701fb25bb660e074cab703ed3fe7 were untested with `USE_HDFS=1`. There were a couple compiler errors. This PR fixes them.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5444

Test Plan:
```
$ EXTRA_LDFLAGS="-L/tmp/hadoop-3.1.2/lib/native/" EXTRA_CXXFLAGS="-I/tmp/hadoop-3.1.2/include" USE_HDFS=1 make -j12 check
```

Differential Revision: D15885009

fbshipit-source-id: 2a0a63739e0b9a2819b461ad63ce1292c4833fe2

env/env_hdfs.cc

@@ -420,7 +420,7 @@ Status HdfsEnv::NewRandomAccessFile(const std::string& fname,
 // create a new file for writing
 Status HdfsEnv::NewWritableFile(const std::string& fname,
                                 std::unique_ptr<WritableFile>* result,
-                                const EnvOptions& /*options*/) {
+                                const EnvOptions& options) {
   result->reset();
   Status s;
   HdfsWritableFile* f = new HdfsWritableFile(fileSys_, fname, options);
@@ -590,6 +590,11 @@ Status HdfsEnv::UnlockFile(FileLock* /*lock*/) { return Status::OK(); }
 
 Status HdfsEnv::NewLogger(const std::string& fname,
                           std::shared_ptr<Logger>* result) {
+  // EnvOptions is used exclusively for its `strict_bytes_per_sync` value. That
+  // option is only intended for WAL/flush/compaction writes, so turn it off in
+  // the logger.
+  EnvOptions options;
+  options.strict_bytes_per_sync = false;
   HdfsWritableFile* f = new HdfsWritableFile(fileSys_, fname, options);
   if (f == nullptr || !f->isValid()) {
     delete f;