The AWS key management plugin is not being built on Debian and Ubuntu. Looks like it started not building after 10.3.5 was released.

In the build log there are `dh_missing` entries that say the following:

dh_missing: usr/lib/mysql/plugin/aws_key_management.so exists in debian/tmp but is not installed to anywhere

dh_missing: etc/mysql/conf.d/aws_key_management.cnf exists in debian/tmp but is not installed to anywhere

http://buildbot.askmonty.org/buildbot/builders/kvm-deb-artful-amd64/builds/1300/steps/compile/logs/stdio

So something is getting built, but the deb package is not getting created for some reason.