(core): sheldon won't work with sight/examples/core/ExTimeLine/rc/plugin.xml

Summary

Run sheldon on sight/examples/core/ExTimeLine/rc/plugin.xml ->

*** [ERROR] Dependency missing in examples/core/ExTimeLine/rc/plugin.xml :
- an object from 'MessageTL' is used but the module is missing from the 'CMakeLists.txt' requirements.
***

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