ignore SIGPIPE signal in native services

When run dump method via dumpsys command with invalid pipe fd, native
services can crash with SIGPIPE.
So ignore SIGPIPE signal.

Bug: https://code.google.com/p/android/issues/detail?id=184099
Change-Id: Icb15e0dff34a245c08c1b4c4bed51992ae382da4
Signed-off-by: Young-Ho Cha <ganadist@gmail.com>
2 files changed