scons: Generate cxx config wrappers using a helper script.

Change-Id: I003426881dc0fd8a338048abbdfa05a606221c39
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/49427
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
3 files changed