Alex Hoppen ee53f858c5 Globally ignore SIGPIPE on Linux ...

We receive a `SIGPIPE` if we write to a pipe that points to a crashed process. This in particular happens if the target of a `JSONRPCConnection` has crashed and we try to send it a message.
On Darwin, `DispatchIO` ignores `SIGPIPE` for the pipes handled by it, but that features is not available on Linux.
Instead, globally ignore `SIGPIPE` on Linux to prevent us from crashing if the `JSONRPCConnection`'s target crashes.

Fixes rdar://75580936

2021-03-22 22:40:47 +01:00

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