Currently such syntax fails:

create table t1 (i int) with system versioning partition by system_time;

with error message:

ERROR 1492 (HY000): For LIST partitions each partition must be defined

which is by itself incorrect.

Auto-create 1 history partition and 1 working partition for the above syntax. Specify the number of history partitions by the partitions keyword:

create table t1 (i int) with system versioning partition by system_time partitions 2;

This should create 1 history and 1 working partition. The working partition is mandatory, so partitions 1 should fail with error.