Add missing cereal dependency

The repository uses cereal as a serialization library to persist
the dbus object changes.So we better add it to the dependency list
so that , there will be an explicit checking in the configuration
stage rather than bailing out with a compile failure.

Change-Id: Id674c3a1eb47d9df9a9aaeaba278509f467765b8
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/meson.build b/meson.build
index d9b7b37..2733a1e 100644
--- a/meson.build
+++ b/meson.build
@@ -35,7 +35,8 @@
         dependency('sdbusplus'),
         dependency('systemd'),
         dependency('openssl'),
-        dependency('nlohmann_json',include_type: 'system')
+        dependency('nlohmann_json',include_type: 'system'),
+        dependency('cereal')
 ]
 
 src_files = ['src/main.cpp',