obmc-phosphor-image: Enable debug tarball

Change-Id: Ic7491464ef5acf39ad36b03178aa715c244a5329
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meta-phosphor/classes/obmc-phosphor-image.bbclass b/meta-phosphor/classes/obmc-phosphor-image.bbclass
index 2d97cde..f1714ca 100644
--- a/meta-phosphor/classes/obmc-phosphor-image.bbclass
+++ b/meta-phosphor/classes/obmc-phosphor-image.bbclass
@@ -55,3 +55,5 @@
 
 IMAGE_FSTYPES += "${@image_overlay_enabled(d, "overlay")}"
 inherit ${@image_overlay_enabled(d, "image-overlay")}
+
+do_image_complete[depends] += "obmc-phosphor-debug-tarball:do_image_complete"