Failures on Debian-s390x-native-extended-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-extended-gdbserver-m64/builds/4143>

Commit(s) tested:
	210477268d4ac5cad937e811888a5c932206794c

Author(s) (in the same order as the commits):
	Pedro Alves <palves@redhat.com>

Subject:
	Fix gdb_xml_debug/gdb_xml_error ATTRIBUTE_PRINTF use

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Debian-s390x-native-extended-gdbserver-m64/21/210477268d4ac5cad937e811888a5c932206794c/>