types: add kEntryBlobIndex for TablePropertiesCollector (#4233)

Summary:
So that we can act accordingly on blob index entries
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4233

Differential Revision: D9190205

Pulled By: yiwu-arbug

fbshipit-source-id: e5b84d5b41e44fa7a76762f1f7b0305369bb3a0c

db/dbformat.cc

@@ -48,6 +48,8 @@ EntryType GetEntryType(ValueType value_type) {
       return kEntryMerge;
     case kTypeRangeDeletion:
       return kEntryRangeDeletion;
+    case kTypeBlobIndex:
+      return kEntryBlobIndex;
     default:
       return kEntryOther;
   }

include/rocksdb/types.h

@@ -23,6 +23,7 @@ enum EntryType {
   kEntrySingleDelete,
   kEntryMerge,
   kEntryRangeDeletion,
+  kEntryBlobIndex,
   kEntryOther,
 };