[Toybox] [PATCH] Fix pidof tests when stdout is a socket

[Colin Cross]

The pidof tests try to block a subprocess forever by reading from
stdout via /proc/self/fd/1.  This works for most stdout fds, but
fails if stdout is a socket, which happens when running the tests
in a sandbox in the Android build.  Create a named fifo and read
on that instead.
---
 tests/pidof.test | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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