Failures on RHEL-s390x-m64, branch master

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	rhel-7_1-s390x-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/RHEL-s390x-m64/builds/6535>

Commit(s) tested:
	5dc4391345f6e86906a57af1434025cfb47b4100

Author(s) (in the same order as the commits):
	Andrew Burgess <andrew.burgess@embecosm.com>

Subject:
	gdb/amd64: Ignore zero sized fields when calling functions

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/RHEL-s390x-m64/5d/5dc4391345f6e86906a57af1434025cfb47b4100/>