package/vsftpd: renumber patches

Commit 415765b5a8861f3b7e86e9786bf903a5a4d09e73 removed the second patch
without renumbering the remaining ones

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>