Add patches for CONC-226 (https://jira.mariadb.org/browse/CONC-226)

Upstream version 2.3.2

* libmariadb-dev-compat only installs files in multiarch paths

Upstream version 2.3.1

Add DEP-12 formatted upstream metadata file

The package libmariadbclient-dev-compat provide most of the same files
(e.g. libmysqlclient.so) and the libmariadbclient-dev also provides some
files (e.g. mysql_config), so they must conflict each other.

This set of packages provide the same functionality, so it is logical
that they conflict and cannot be installed at the same time.

Upstream version 2.3.0

Also update the description of lib_install_dir.patch