[debian-mysql] Bug#1115369: galera-4: build with system ASIO instead of the embedded copy

[Otto Kekäläinen]

Package: galera-4
Version: 26.4.23-1
Forwarded: https://jira.mariadb.org/browse/MDEV-36926
Owner: otto at debian.org

Galera 4 currently builds with the embedded copy of ASIO. It would be
better to use the system version.

See
- https://jira.mariadb.org/browse/MDEV-36926
- https://github.com/codership/galera/tree/4.x/asio