build-unit-test-docker: New phosphor-dbus flag

Now that the org.open_power D-Bus interfaces moved into
phosphor-dbus-interfaces, a configure option is needed for
phosphor-dbus-interfaces to enable them.

(Cannot remove openpower-dbus-interfaces yet as many repos
still look for it.)

Change-Id: I83f31383ae34d844413d810028d405dbbb7c207c
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed