tests/tcg/s390x: Test modifying an EXECUTE target

QEMU correctly implements the tracking of EXECUTE target modifications
by storing the instruction text in env->ex_value and tb->cs_base, the
latter

tests/tcg/s390x: Test modifying an EXECUTE target

QEMU correctly implements the tracking of EXECUTE target modifications
by storing the instruction text in env->ex_value and tb->cs_base, the
latter of which is used for lookups.

Still, EXECUTE is a tricky corner of the s390x emulation, which can
benefit from having a regression test.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-ID: <20241001145634.9786-1-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

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