Hostboot: Fix compiler fail on Fedora20.
See open-power/hostboot#10.
diff --git a/openpower/package/hostboot/hostboot.mk b/openpower/package/hostboot/hostboot.mk
index cdba674..9c39190 100644
--- a/openpower/package/hostboot/hostboot.mk
+++ b/openpower/package/hostboot/hostboot.mk
@@ -4,7 +4,7 @@
#
################################################################################
-HOSTBOOT_VERSION ?= c1c0f838d21167482e292246435e7c07f8bfa3bd
+HOSTBOOT_VERSION ?= a91a8f7b3d35490845272e839e372329114df7a4
HOSTBOOT_SITE ?= $(call github,open-power,hostboot,$(HOSTBOOT_VERSION))
HOSTBOOT_LICENSE = Apache-2.0