After upstream started to provide a compatible symbol versioning, we are free
to use their versioning scripts.

However, we are still missing symbol my_progname, which is not exported
in upstream scripts yet.

Upstream bug: https://mariadb.atlassian.net/browse/MDEV-6273

diff -up mariadb-5.5.37/libmysql/CMakeLists.txt.symbols mariadb-5.5.37/libmysql/CMakeLists.txt
--- mariadb-5.5.37/libmysql/CMakeLists.txt.symbols	2014-05-26 18:37:22.109316009 +0200
+++ mariadb-5.5.37/libmysql/CMakeLists.txt	2014-05-26 18:37:42.457338366 +0200
@@ -138,6 +138,7 @@ my_print_help
 )
 
 SET(CLIENT_API_FUNCTIONS_5_5
+my_progname
 mysql_stmt_next_result
 # Client plugins
 mysql_client_find_plugin