s390x: add test cases for STCK{,E,F} instructions.  See #271779.
(Christian Borntraeger <borntraeger@de.ibm.com> and Divya Vyas)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11766 a5019735-40e9-0310-863c-91ae7b9d1cf9
15 files changed