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/3848>

Commit(s) tested:
	4c2c7ac69d7318d61a5c0e4f5ddcee1c1597f4e0

Author(s) (in the same order as the commits):
	Markus Metzger <markus.t.metzger@intel.com>

Subject:
	btrace: preserve call stack on function switch

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Debian-s390x-native-extended-gdbserver-m64/4c/4c2c7ac69d7318d61a5c0e4f5ddcee1c1597f4e0/>