audio_server: Add signal handler. [2/2]

PD#TV-29081

Problem:
There is no meaningful backtrace when audio server
crashes.

Solution:
Add abort and segfault signal handler in audio
server to print backtrace when crash happens.

Verify:
Verified with crash test.

Change-Id: I1dc8d210d1419ee8620bad37d37c16e4d5f19ecd
2 files changed
tree: 8984be5e4a6b8de0c66f51088eadb9422456d836
  1. include/
  2. src/
  3. Makefile