Use sdeventplus

Start using the sdeventplus event mechanisms so that future code
can take advantage of it for things like timers and other events.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I6ffe80266257bfd3512a5b848c47f5ccfb5206e8
diff --git a/Makefile.am b/Makefile.am
index e1ec5c3..81745a0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -70,10 +70,12 @@
 		$(SYSTEMD_LIBS) \
 		$(SDBUSPLUS_LIBS) \
 		$(PHOSPHOR_DBUS_INTERFACES_LIBS) \
+		$(SDEVENTPLUS_LIBS) \
 		-lstdc++fs
 phosphor_log_manager_CXXFLAGS = \
 		$(SYSTEMD_CFLAGS) \
 		$(SDBUSPLUS_CFLAGS) \
+		$(SDEVENTPLUS_CFLAGS) \
 		$(PHOSPHOR_DBUS_INTERFACES_CFLAGS)