op-build update Nov 12th

Updated versions: firestone.xml and hostboot
Tested on HW (IPL to petitboot)
diff --git a/openpower/package/palmetto-xml/palmetto-xml.mk b/openpower/package/palmetto-xml/palmetto-xml.mk
index 07b9d24..8130f4e 100644
--- a/openpower/package/palmetto-xml/palmetto-xml.mk
+++ b/openpower/package/palmetto-xml/palmetto-xml.mk
@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PALMETTO_XML_VERSION = 82818682f2c2009c30d700df6d5f8897a3096e4f
+PALMETTO_XML_VERSION ?= 82818682f2c2009c30d700df6d5f8897a3096e4f
 PALMETTO_XML_SITE = $(call github,open-power,palmetto-xml,$(PALMETTO_XML_VERSION))
 
 PALMETTO_XML_LICENSE = Apache-2.0