queue(3): Add simple tests for some macros for all list/tailq types

[olce]

Summary

These essentially test building a list/tailq of 100 elements with
_INSERT_HEAD(), iterating over them with _FOREACH(), splitting it with
_SPLIT_AFTER() and concatenating back the results with _CONCAT(),
checking that the lists/tailqs at each step have the right number of
elements and at the expected positions.

[olce]

Define QUEUE_MACRO_DEBUG_ASSERTIONS explicitly (as this is not automatically enabled for userland programs).