Recipe for phosphor-discover-system-state

This recipe will add the new program phosphor-discover-system-state
to new builds. Additionally, the old Python state manager is
removed from the build since discover_system_state.py was the last
thing in it.

Resolves openbmc/openbmc#773

Change-Id: I99ba0f1f0264cedebc5a9a7e5fa5dbaba0b79502
Signed-off-by: Michael Tritz <mtritz@us.ibm.com>
diff --git a/conf/distro/include/phosphor-defaults.inc b/conf/distro/include/phosphor-defaults.inc
index 296d304..75d51db 100644
--- a/conf/distro/include/phosphor-defaults.inc
+++ b/conf/distro/include/phosphor-defaults.inc
@@ -32,6 +32,13 @@
 # interface.
 VIRTUAL-RUNTIME_obmc-host-state-manager ?= "phosphor-state-manager-host"
 
+# obmc-discover-system-state
+#
+# Provides an implementation of phosphor-discover-system-state, which, if the
+# host is powered off, will check the current power policy and, if necessary,
+# power the host back on.
+VIRTUAL-RUNTIME_obmc-discover-system-state ?= "phosphor-state-manager-discover"
+
 # obmc-fan-presence
 #
 # Provides implementations of fan presence detection