Add pkg check for openpower-dbus-interfaces

Change-Id: I00eb7448452df9a0e550c8d4fbdb07c070d7fc9f
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/scripts/unit-test.py b/scripts/unit-test.py
index a671647..a1ca5ce 100755
--- a/scripts/unit-test.py
+++ b/scripts/unit-test.py
@@ -146,6 +146,7 @@
         'AC_PATH_PROG': {'sdbus++': 'sdbusplus'},
         'PKG_CHECK_MODULES': {
             'phosphor-dbus-interfaces': 'phosphor-dbus-interfaces',
+            'openpower-dbus-interfaces': 'openpower-dbus-interfaces',
             'sdbusplus': 'sdbusplus',
             'phosphor-logging': 'phosphor-logging',
         },