stdlib: Update the gem5 resources' version to "v22.1"

This is required to ensure the correct version of the resources are
obtained for this version of gem5.

Change-Id: If316081c776d510ec9a2f7ff9e077a1f837d2d2e
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65915
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
1 file changed