Add details about THREAD_RUNTIME_STATS and how it can be used and
document how the feature can be used with an example.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The debugging section was generalized for flash and debugging tools.
The links were refactored accordly and all references were updated.
To be consistent, the directory doc/guides/debbugging was renamed to
doc/guides/flash_debug.
Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
