add test_irq
Merge pull request #40 from LudwigOrtmann/test_irq

add test_irq
fix uart init in test_irq
fix uart init in default-native
replace debug with valgrind target
clean up default-native modules
unclutter default-native messages, fix warning
replace debug with valgrind target
Merge pull request #41 from LudwigOrtmann/native_projects_cleanup

Native projects cleanup
posix: add pthread test case