Failures on Fedora-ppc64le-native-extended-gdbserver-m64, branch master

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	fedora-ppc64le-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/Fedora-ppc64le-native-extended-gdbserver-m64/builds/5268>

Commit(s) tested:
	c053b65441eb70ac78a514fabc3431b857a30d2e

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

Subject:
	Initialize gdb::optional empty payload to quiet false -Wmaybe-uninitialized warnings

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Fedora-ppc64le-native-extended-gdbserver-m64/c0/c053b65441eb70ac78a514fabc3431b857a30d2e/>