Currently we see this in "git status" if we build in the source dir:

Untracked files:
(use "git add ..." to include in what will be committed)

certs/x509_certificate_list

It looks like it used to live in kernel/ so we squash that .gitignore
entry at the same time. I didn't bother to dig through git history to
see when it moved, since it is just a minor annoyance at most.

Cc: David Woodhouse
Cc: keyrings@linux-nfs.org
Signed-off-by: Paul Gortmaker
Signed-off-by: David Howells