ignore SIGPIPES

During bugreports mostly, when adb goes away it leads to apps crashing
because their output stream got closed.
Let's just ignore it.

Bug: 6447319
Change-Id: I1b293ebef737014162edebd5fd9bf254345b2ce8
am 42ea6673: ignore SIGPIPES

* commit '42ea6673b74e0ee9ad17f5462dc171fbe1491137':
  ignore SIGPIPES
Merge tag android-4.3.1_r1 into dev-mips-jb-mr2