Correct bug when reading RCUTILS_CONSOLE_STDOUT_LINE_BUFFERED (#161)
Correct bug when reading RCUTILS_CONSOLE_STDOUT_LINE_BUFFERED (#161)

* Correct bug when reading RCUTILS_CONSOLE_STDOUT_LINE_BUFFERED environment variable.
* Moved RCUTILS_CONSOLE_STDOUT_LINE_BUFFERED logic to rcutils_logging_initialize_with_allocator.
* Change strcmp style in logging.c.
* Deleted unneeded if clause in RCUTILS_COLORIZED_OUTPUT reading logic.
ros2/c_utilities,ros2/c_utilities