python: Fix up arrow in interactive shell

Simply by importing the readline module, the up arrow will work in
gem5's interactive shell now.

Change-Id: I41d87adc34253abf5a00ac484da377f9f065a27a
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/62671
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
1 file changed