Switch sd_event loops to sdeventplus

This change is mostly focused around plumbing the sdeventplus::Event
object everywhere and using the member functions provided for the event.
No migration to the timer utility is performed yet.

Change-Id: I912ab82bc081239d3b7c3cf7c5caca6742ef9c87
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/presence/Makefile.am b/presence/Makefile.am
index eb4dd6c..8fa0259 100644
--- a/presence/Makefile.am
+++ b/presence/Makefile.am
@@ -16,11 +16,13 @@
 phosphor_fan_presence_tach_LDADD = \
 	$(top_builddir)/libfan.la \
 	$(SDBUSPLUS_LIBS) \
+	$(SDEVENTPLUS_LIBS) \
 	$(PHOSPHOR_LOGGING_LIBS) \
 	${PHOSPHOR_DBUS_INTERFACES_LIBS} \
 	$(LIBEVDEV_LIBS)
 phosphor_fan_presence_tach_CXXFLAGS = \
 	$(SDBUSPLUS_CFLAGS) \
+	$(SDEVENTPLUS_CFLAGS) \
 	$(PHOSPHOR_LOGGING_CFLAGS) \
 	${PHOSPHOR_DBUS_INTERFACES_CFLAGS} \
 	$(LIBEVDEV_CFLAGS) \