C: add WriteBatch.PutLogData support

db/c.cc

@@ -1266,6 +1266,12 @@ void rocksdb_writebatch_deletev_cf(
   b->rep.Delete(column_family->rep, SliceParts(key_slices.data(), num_keys));
 }
 
+void rocksdb_writebatch_put_log_data(
+    rocksdb_writebatch_t* b,
+    const char* blob, size_t len) {
+  b->rep.PutLogData(Slice(blob, len));
+}
+
 void rocksdb_writebatch_iterate(
     rocksdb_writebatch_t* b,
     void* state,

include/rocksdb/c.h

@@ -459,6 +459,9 @@ void rocksdb_writebatch_deletev_cf(
     rocksdb_column_family_handle_t* column_family,
     int num_keys, const char* const* keys_list,
     const size_t* keys_list_sizes);
+extern void rocksdb_writebatch_put_log_data(
+    rocksdb_writebatch_t*,
+    const char* blob, size_t len);
 extern void rocksdb_writebatch_iterate(
     rocksdb_writebatch_t*,
     void* state,