Revert "Drop x86-TF-06"

This reverts commit 0a92715ac3925b12e30d65f5e30b26a04d9f948e.

Reason for revert: x86-TF-06 still exists, and used for builds. It thus needs to have docker images, etc. updated. See https://linaro.atlassian.net/browse/STG-5588

Change-Id: Id2661a92fd660d5377fc23ad19a087951002a389
1 file changed