Handle new and/or missing files

(cherry picked from commit 151fbc9a)

debian/libmariadbclient-dev.install

 #!/usr/bin/dh-exec
 usr/bin/mysql_config
 usr/include/mysql/*.h
+usr/include/mysql/private/*.h
 usr/include/mysql/psi/*.h
 usr/lib/*/libmariadbclient.a
 usr/lib/*/libmariadbclient.so

debian/not-installed

@@ -357,3 +357,9 @@ usr/share/mysql/systemd/mariadb@.service
 usr/share/man/man1/mysqlbug.1
 usr/share/man/man1/mysql.server.1
 usr/share/man/man1/my_safe_process.1
+usr/share/groonga-normalizer-mysql/README.md
+usr/share/groonga-normalizer-mysql/lgpl-2.0.txt
+usr/share/mysql/mroonga/COPYING
+usr/share/mysql/mroonga/AUTHORS
+usr/share/groonga/README.md
+usr/share/groonga/COPYING