misc,base: Update the version to v21.2.1.1

Change-Id: I26f7689b7c266951dd6c410a74d53753f42de107
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/59270
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
2 files changed