[t:3908], don't fsync log during begin_checkpoint

git-svn-id: file:///svn/toku/tokudb@35694 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/cachetable.c

@@ -2885,7 +2885,7 @@ toku_cachetable_begin_checkpoint (CACHETABLE ct, TOKULOGGER logger) {
 	    // The checkpoint must be performed after the lock is acquired.
 	    {
 		LSN begin_lsn={.lsn=-1}; // we'll need to store the lsn of the checkpoint begin in all the trees that are checkpointed.
-		int r = toku_log_begin_checkpoint(logger, &begin_lsn, 1, 0);
+		int r = toku_log_begin_checkpoint(logger, &begin_lsn, 0, 0);
 		assert(r==0);
 		ct->lsn_of_checkpoint_in_progress = begin_lsn;
 	    }