add abrt suppport for rasdaemon

add abrt suppport for rasdaemon

Adds abrt as another error mechanism for the rasdaemon.
This patch does:

1) read ras event (mc,mce and aer)

2) setup a abrt-server unix socket

3) write messages follow ABRT server protocol, set event
   info into backtrace zone.

4) commit report.

For now, it depends on ABRT to limit flood reports.

Signed-off-by: Junliang Li <lijunliang.dna@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>