Daniel Vetter 93824f0cd0 lib: Unit test for exit handler
Checks that
- exit handlers are run only once, even when registered multiple
  times.
- run in reverse order
- actually run for all ways a test could exit.

This is prep work to extend exit handlers to also work in a subtest
aware way.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
2016-03-08 17:12:04 +01:00
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