FP2-715[APP_Clock]Default alarm ringtone is unknown ringtone in the clock

The default ringtone isn't add to the list

Change-Id: Id806649e26e1b16aa51a52ed843a8a78ab7876d1
diff --git a/target/product/core_base.mk b/target/product/core_base.mk
index aa07ad1..1c11be7 100644
--- a/target/product/core_base.mk
+++ b/target/product/core_base.mk
@@ -18,7 +18,7 @@
 
 PRODUCT_PROPERTY_OVERRIDES := \
     ro.config.notification_sound=OnTheHunt.ogg \
-    ro.config.alarm_alert=Alarm_Classic.ogg
+    ro.config.alarm_alert=Cesium.ogg
 
 PRODUCT_PACKAGES += \
     ContactsProvider \