The reason for the crash is Innodb assertion after trying to load condition variables function
dynamically and not finding them

The fix is to skip dynamic loading if srv_use_native_conditions is FALSE. srv_use_native_conditions 
is derived from Windows version and would be FALSE on XP and TRUE on later Windows.

This is the same handling as in MySQL 5.. In Maria 5.3 srv_use_native_conditions check was 
presumably  lost in the downporting.