stdlib, configs: Add example FS script for RISCV Matched

This script loads riscv-bootloader-vmlinux-5.10 onto a
riscv-ubuntu-20.04-img disk image on the RISCVMatched
prebuilt board found at
src/python/gem5/prebuilt/riscvmatched directory.

Change-Id: Ic2b4b19bac0a66d40d667b82a43c7791ff918847
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64014
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed