[Buildroot] [PATCH 2/2] package/dovecot-pigeonhole: security bump version to 0.5.15

[Peter Korsgaard]

>>>>> "Bernd" == Bernd Kuhls <bernd.kuhls at t-online.de> writes:

 > Fixes CVE-2020-28200:
 > https://dovecot.org/pipermail/dovecot-news/2021-June/000460.html

 > Release notes:
 > https://dovecot.org/pipermail/dovecot-news/2021-June/000458.html

 > Signed-off-by: Bernd Kuhls <bernd.kuhls at t-online.de>

Committed to 2021.02.x and 2021.05.x, thanks.

-- 
Bye, Peter Korsgaard