Where files are link()'d and one is unlink()'d, pseudo's fd mappings
can become confused. Add a patch to try and improve this for the common
usecases we see.
(From OE-Core rev: 9ce621fa2099608ca0ccbb8420b31d71cdd7b00e)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>