Enabling checksum in repair db as it should have been.

Summary: I think the checksum was turned off by mistake.

Test Plan: Run make check

Reviewers: igor sdong chip

CC:

Task ID:

Blame Rev:

db/repair.cc

@@ -217,7 +217,7 @@ class Repairer {
     // corruptions cause entire commits to be skipped instead of
     // propagating bad information (like overly large sequence
     // numbers).
-    log::Reader reader(std::move(lfile), &reporter, false/*do not checksum*/,
+    log::Reader reader(std::move(lfile), &reporter, true /*enable checksum*/,
                        0/*initial_offset*/);
 
     // Read all the records and add to a memtable