FUSE readdir: call do_forget for rejected directory entry node.

If buffer capacity is not enough to hold current directory entry, the directory
entry gets rejected. In this case, lookup called by readdir_plus will not be
tracked by kernel. Call forget on the rejected node to decrement the reference
count.
Test: N.A.
Bug: 145989506

Change-Id: Ic84d3a9094606245f1b5c4e7ff56e43161359dba
1 file changed