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
Merge "ignore SIGPIPES"
Merge tag 'android-4.3_r2.1' into jellybean-mr2.1

Android 4.3 release 2.1