Failures on Debian-s390x-native-gdbserver-m64, branch master

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	debian-jessie-s390x-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/Debian-s390x-native-gdbserver-m64/builds/4098>

Commit(s) tested:
	aa0061181ab00081e9907447561e589d6edee9f2

Author(s) (in the same order as the commits):
	Artemiy Volkov <artemiyv@acm.org>

Subject:
	Convert lvalue reference type check to general reference type check

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Debian-s390x-native-gdbserver-m64/aa/aa0061181ab00081e9907447561e589d6edee9f2/>