util: update termios to replace nl with cr-nl

This change enables OPOST to enable output post-processing. It then
enables ONLCR to prepend newline characters with carriage return so
that start of each line is always left aligned. Note that on some
terminals this might display a redundant ^M.

Change-Id: Ia0b4c61725ab7478e7341273a8279b96e53d9f26
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65152
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed