* Documentation/guides/cortexmhardfaults.rst: New. Migrated from [1] with conversion to reStructuredText, minor typo fixes, and a link to a Narkive archive of the original quoted question. * Documentation/guides/index.rst: Add above to TOC. [1] https://cwiki.apache.org/confluence/display/NUTTX/Analyzing+Cortex-M+Hardfaults