Add missing files of blob_db to CMake file

Summary:
Some of the file from #2269 didn't add to CMake file. Adding them to fix window build.
Closes https://github.com/facebook/rocksdb/pull/2276

Differential Revision: D5043487

Pulled By: yiwu-arbug

fbshipit-source-id: 4eba853e9d92574353abce21d77d30e47ce43d3d

CMakeLists.txt

@@ -447,6 +447,8 @@ set(SOURCES
         utilities/backupable/backupable_db.cc
         utilities/blob_db/blob_db.cc
         utilities/blob_db/blob_db_impl.cc
+        utilities/blob_db/blob_db_options_impl.cc
+        utilities/blob_db/blob_file.cc
         utilities/blob_db/blob_log_reader.cc
         utilities/blob_db/blob_log_writer.cc
         utilities/blob_db/blob_log_format.cc