phosphor-state-manager: Depend on sdeventplus

An upcoming change will require that phosphor-state-manager has
sdeventplus during build time.

Change-Id: If7b1338984b258d44554596aa70cf6b8d121cc89
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/recipes-phosphor/state/phosphor-state-manager.bb b/recipes-phosphor/state/phosphor-state-manager.bb
index 0bdfc61..97d3dc7 100644
--- a/recipes-phosphor/state/phosphor-state-manager.bb
+++ b/recipes-phosphor/state/phosphor-state-manager.bb
@@ -38,6 +38,7 @@
 
 DEPENDS += "autoconf-archive-native"
 DEPENDS += "sdbusplus"
+DEPENDS += "sdeventplus"
 DEPENDS += "phosphor-logging"
 DEPENDS += "phosphor-dbus-interfaces"
 DEPENDS += "cereal"