package/dovecot-pigeonhole: bump version to 0.5.7.1
Release notes:
https://dovecot.org/pipermail/dovecot/2019-July/116622.html
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 267197f593cbe4627a1ab947832f4afabad10e46)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>