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/6906>

Commit(s) tested:
	bedda9aced2b3a8ab05e0fbf1372e394e32afbde

Author(s) (in the same order as the commits):
	Tom Tromey <tom@tromey.com>

Subject:
	Conditionally drop the discriminant field in quirk_rust_enum

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/RHEL-s390x-m64/be/bedda9aced2b3a8ab05e0fbf1372e394e32afbde/>