unit-test.py: Test PDI with additional options
unit-test.py: Test PDI with additional options

When phosphor-dbus-interfaces is under test, enable the org.open_power
and com.ibm interfaces so they get built as well.

Just did this for meson since both meson and autotools run under CI and
the results should be the same, plus the autotools build may soon go
away.

Signed-off-by: Matt Spinler <c000c989d08c98662d98f15448f11de169feb92d@us.ibm.com>
Change-Id: If3a9e09ebc788dc14a3379b1178871c7cee47c1e

openbmc/openbmc-build-scripts,openbmc/openbmc-build-scripts