Fix argument mismatch in BlockBasedTableBuilder (#3974)

Summary:
The sixth argument should be `key_includes_seq` bool, the seventh a `GetContext*`. We were mistakenly passing the `GetContext*` as the sixth argument and relying on the default (nullptr) for the seventh. This would make statistics inaccurate, at least.

Blame: 402b7aa0
Closes https://github.com/facebook/rocksdb/pull/3974

Differential Revision: D8344907

Pulled By: ajkr

fbshipit-source-id: 3ad865a0541d6d30f75dfc726352788118cfe12e

table/block_based_table_reader.cc

@@ -2209,7 +2209,7 @@ Status BlockBasedTable::Get(const ReadOptions& read_options, const Slice& key,
       } else {
         BlockIter biter;
         NewDataBlockIterator(rep_, read_options, iiter->value(), &biter, false,
-                             get_context);
+                             true /* key_includes_seq */, get_context);
 
         if (read_options.read_tier == kBlockCacheTier &&
             biter.status().IsIncomplete()) {