The symbol versioning solution for libmysqlclient in mysql 5.1 was pretty
awful (export everything) and as of 5.5.8 the cmake build scripts have
forgotten the issue entirely.  So we now maintain our own list of exported
symbols and jam it into the build with this hack.

MySQL 5.6 still use soname .18 and manage a very different list
So keep our list for compatitility.

--- mysql-5.6.10/libmysql/CMakeLists.txt.orig	2013-02-13 09:44:02.368490458 +0100
+++ mysql-5.6.10/libmysql/CMakeLists.txt	2013-02-13 09:44:06.674509715 +0100
@@ -221,7 +221,7 @@
       SET(libmysql_link_flags
         "${libmysql_link_flags} ${LINK_FLAG_NO_UNDEFINED}")
       SET(libmysql_link_flags
-        "${libmysql_link_flags} -Wl,--version-script=libmysql.ver")
+        "${libmysql_link_flags} -Wl,--version-script=libmysql.version")
       SET_TARGET_PROPERTIES(libmysql
         PROPERTIES LINK_FLAGS "${libmysql_link_flags}")
     ENDIF()