uffi: run-shell-command: remove bogus argument from argument list
uffi: run-shell-command: remove bogus argument from argument list

If &key arguments are mixed with &rest, then all provided keys are
mixed with rest. Since function passes all `rest' to shell command,
then it is undesireable to have there :output *xxx* - this would break
shell command call. `output' argument is removed now and output is
bound to *trace-output*.

Signed-off-by: Daniel Kochmański <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@turtleware.eu>

mcna/cffi,stassats/cffi,3b/cffi,dkochmanski/cffi,dkochmanski/cffi,cffi/cffi,stassats/cffi,cffi/cffi,stassats/cffi,3b/cffi,attila-lendvai/cffi,mcna/cffi,cffi/cffi,attila-lendvai/cffi,3b/cffi,dkochmanski/cffi