runtime: correct facilities names in s390 CPU support
runtime: correct facilities names in s390 CPU support

Patch from Andreas Krebbel.

Change-Id: Ia3d4da4b733b5f80be5a4f527b413753010e718f
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/201038
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

golang/gofrontend,golang/gofrontend,golang/gofrontend,golang/gofrontend