psuedo: Add tracking of linked files for fds

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>

meta/recipes-devtools/pseudo/pseudo_git.bb

@@ -5,6 +5,7 @@ SRC_URI = "git://git.yoctoproject.org/pseudo;branch=oe-core \
            file://delete_mismatches.patch \
            file://add_ignore_paths.patch \
            file://abort_on_mismatch.patch \
+           file://track_link_fds.patch \
            file://fallback-passwd \
            file://fallback-group \
            "