Failures on Debian-s390x-native-gdbserver-m64, branch gdb-8.1-branch

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	debian-jessie-s390x-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/Debian-s390x-native-gdbserver-m64/builds/5324>

Commit(s) tested:
	e378993dd341b10571a7cb6e98d5d3b48a06e24c

Author(s) (in the same order as the commits):
	Joel Brobecker <brobecker@adacore.com>

Subject:
	[gdbserver/win32] fatal "glob could not process pattern '(null)'" error

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Debian-s390x-native-gdbserver-m64/e3/e378993dd341b10571a7cb6e98d5d3b48a06e24c/>