buildbot kvm-deb-xenial-ppc64le updates

Hey Daniel Bartholomew,

I made a change in 10.5 that changed the way libmariadbd.a was generated using a scripted version of ar. Generally this is fine except for the kvm-deb-xenial-ppc64le worker node. On a local Power8 xenial docker image I was able to complete the build in the same way without error.

example failure: http://buildbot.askmonty.org/buildbot/builders/kvm-deb-xenial-ppc64le/builds/6836/steps/compile/logs/stdio

Can I ask for a binutils upgrade on kvm-deb-xenial-ppc64le. - 2.26.1-1ubuntu1~16.04.8 worked for me.

Secondly the minor-upgrade-* tests are failing on:

+ mysql -uroot -prootpass -e 'SELECT * FROM db.t_memory; INSERT INTO db.t_memory VALUES (1,'\''foo'\''),(2,'\''bar'\'')'

+----+------+

| a4 | c4   |

+----+------+

|  1 | foo  |

|  2 | bar  |

+----+------+

ERROR 1062 (23000) at line 1: Duplicate entry '1' for key 'a4'

ref: http://buildbot.askmonty.org/buildbot/builders/kvm-deb-xenial-ppc64le/builds/6825/steps/minor-upgrade-deps/logs/stdio

I assume db.t_memory is meant to be a memory storage engine based on the surrounding logs however the error indicates that some data exists there already. Can you ensure it is the same table definition as other builders?