Customization point for custom abortion function.

[niklas-uhl]

kassert/include/kassert/internal/assertion_macros.hpp

Lines 66 to 71 in e683aef

	#expression \
	)) { \
	kassert::Logger<std::ostream&>(std::cerr) << message << "\n"; \
	std::abort(); \
	} \
	KASSERT_KASSERT_HPP_DIAGNOSTIC_POP \

It would be nice to have the possibility to define a custom abortion function here. This may for example be used to wire stacktrace printing.