Workaround for Linux 32-bit build
Workaround for Linux 32-bit build

This adds a workaround for the `secretservice` sub-package to build under 32bit Linux.
It limits the total number of list entries to (2^29)-1.
A short explanation of how this number was calculated has been added in a comment.

Signed-off-by: Daniel Joos <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@joosweb.de>

docker/docker-credential-helpers,docker/docker-credential-helpers,docker/docker-credential-helpers