s390: sframe: Test handling of .cfi_def_cfa_register

Port x86-64 test for handling of .cfi_def_cfa_register from commit
3602da6fa285 ("gas: sframe: fix handling of .cfi_def_cfa_register")
to s390x.

gas/testsuite/
	PR gas/32879
	* gas/cfi-sframe/cfi-sframe.exp: Add new test for handling of
	.cfi_def_cfa_register on s390x.
	* gas/cfi-sframe/cfi-sframe-s390x-3.d: Likewise.
	* gas/cfi-sframe/cfi-sframe-s390x-3.s: Likewise.

Bug: https://sourceware.org/PR32879
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
3 files changed