Patch 6a7e2bbe docs: add virtiofsd(1) man page introduced new man
page virtiofsd.1. Unfortunately, wrong file location is used as
source for install command. This cause installation of docs fail.

Fixing wrong location so installation is successful.

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
Message-Id: <1608747495.7195569.1581513386780.JavaMail.zimbra@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>