Add an API for retrieving crash information

Areas we require crash information for include:
 * kernel
 * subsystems
 ** dsps
 ** lpass
 ** modem
 ** wcnss
 * applications

This information will help provide MTBF metrics for the stability of
the platform as well as minimal information to help debug issues.

Issue: FPFL-6
Change-Id: I21e6dbbe47e4845a7ce9c9a0b0ba6df5303c9f81
6 files changed