rasdaemon: Add support for extlog trace events

rasdaemon: Add support for extlog trace events

Linux kernel 3.17 includes a new trace event to pick up extended
error logs produced by BIOS in the Common Platform Error Record
format described in appendix N of the UEFI standard. This patch
adds support to collect that information and log it both in
readable ASCII and into the sqlite3 database that rasdaemon
uses to store all error information.  In addition ras-mc-ctl
is updated to query that database for both detailed and summary
reports.

Big thanks to Aristeu for pretty much all the sqlite3 pieces,
plus testing and fixing miscellaneous issues elsewhere.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>