Currently if we fail to auto detect an rtos then no warning is given.
This can also be triggered if we only find some of the rtos symbols.
Change-Id: I215991bbce0909bc6af93560b0f55db13defd123
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/1514
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>