scons,misc: Fix broken X86_MI_example build_opts

This bug was causing the compiler tests to fail:
https://jenkins.gem5.org/job/compiler-checks/65/

Change-Id: I472a50a4a415108d177255fa396e67385104b059
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53684
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed