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/6833>

Commit(s) tested:
	0bee6dd4aa42b928c2a7a496596490b694e5722b

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

Subject:
	Apply "Convert observers to C++" edit to gdbarch.sh

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/RHEL-s390x-m64/0b/0bee6dd4aa42b928c2a7a496596490b694e5722b/>