meta-phosphor: Use obmc-phosphor-event for qemu systems

Yocto 2.1 can't seem to find the original reference package
obmc-phosphor-eventd.  obmc-phosphor-event is a full
implementation that works on qemu, so we will use it instead.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/conf/machine/include/sample.inc b/conf/machine/include/sample.inc
index e66dc77..b499940 100644
--- a/conf/machine/include/sample.inc
+++ b/conf/machine/include/sample.inc
@@ -24,7 +24,7 @@
        "
 PREFERRED_PROVIDER_virtual/obmc-phosphor-host-ipmi-hw = "host-ipmi-hw-example"
 PREFERRED_PROVIDER_virtual/obmc-phosphor-chassis-mgmt = "obmc-phosphor-chassisd"
-PREFERRED_PROVIDER_virtual/obmc-phosphor-event-mgmt = "obmc-phosphor-eventd"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-event-mgmt = "obmc-phosphor-event"
 PREFERRED_PROVIDER_virtual/obmc-phosphor-fan-mgmt = "obmc-phosphor-fand"
 PREFERRED_PROVIDER_virtual/obmc-phosphor-flash-mgmt = "obmc-phosphor-flashd"
 PREFERRED_PROVIDER_virtual/obmc-phosphor-policy-mgmt = "obmc-phosphor-policyd"