s390: Add tests for readelf --got-contents option
Port tests from x86 commit 81e90cf63a10 ("readelf: Add --got-contents
option") to s390 64-bit (s390x).
ld/testsuite/
* ld-s390/binutils.exp: New file.
* ld-s390/got-1.s: Likewise.
* ld-s390/libgot_64-1a.rd: Likewise.
* ld-s390/libgot_64-1b.rd: Likewise.
* ld-s390/libgot_64-1c.rd: Likewise.
* ld-s390/libgot_64-1d.rd: Likewise.
Signed-off-by: Jens Remus <jremus@linux.ibm.com>