Merge pull request #1502 from Kijewski/issue-1485

tests/shell/Makefile

tests/shell/ReadMe.txt

tests/shell/main.c

tests/shell/tests/01-basic

tests/shell/tests/02-unknown-command

tests/shell/tests/03-inputlength-regression

tests/struct_tm_utility/Makefile

tests/struct_tm_utility/main.c

tests/test_mutex_unlock_and_sleep/Makefile

tests/test_thread_basic/Makefile

tests/test_thread_msg_block_w_queue/Makefile

tests/test_thread_msg_block_wo_queue/Makefile

tests/thread_basic/Makefile

tests/thread_basic/main.c

tests/thread_basic/tests/test_thread.py

tests/thread_cooperation/Makefile

tests/thread_cooperation/main.c

tests/thread_exit/Makefile

tests/thread_exit/main.c

tests/thread_exit/tests/hello-world