Ignore SIGPIPE is some of the tools used via bugreport

 adb bugreport > b & sleep 5; kill $?
will show that a bunch of tools will SIGPIPE when trying to output data
which is normal.
We don't have a way on linux (bsd yes), to set NOSIGPIPE on the file desc
passed down via fork/exec.

Bug: 6447319
Change-Id: I25b30a823addcff89d252f162d0a07035d4fdd3f