[Buildroot] [PATCH 1/1] package/openldap: bump to version 2.4.57

[Peter Korsgaard]

>>>>> "Fabrice" == Fabrice Fontaine <fontaine.fabrice at gmail.com> writes:

 > https://www.openldap.org/software/release/changes.html
 > Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>

This fixes CVE-2020-36221..36230, so I've marked it as a security bump
and committed to 2020.02.x and 2020.11.x, thanks.

-- 
Bye, Peter Korsgaard