Only the parent process was being killed, allowing children to accumulate, eventually bringing down the machine.

Change-Id: I84e43265e53fe17058b3e3568919f6fad704f94f
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28350Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>