update mkpnortoc.pl to handle new XML text node name (#text) in perl 5.10.1 and newer
update mkpnortoc.pl to handle new XML text node name (#text) in perl 5.10.1 and newer

Change-Id: Ib8cfd322dbeed97cb68850c8f59833d4e1000919
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/256
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>
Reviewed-by: A. Patrick Williams III <c87e37b1a4035affd737b461af89fb722d635f4d@us.ibm.com>

open-power/hostboot,csmart/hostboot,Over-enthusiastic/hostboot,csmart/hostboot,csmart/hostboot,csmart/hostboot,alvintpwang/hostboot,open-power/hostboot,csmart/hostboot,alvintpwang/hostboot,Over-enthusiastic/hostboot,open-power/hostboot,open-power/hostboot,alvintpwang/hostboot,open-power/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,alvintpwang/hostboot,Over-enthusiastic/hostboot,alvintpwang/hostboot