i#565 win8 support: + support high-addr ntdll in load_syms64 script
i#565 win8 support:
+ support high-addr ntdll in load_syms64 script

SVN-Revision: 1651

code4bones/dynamorio,daksunt/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,code4bones/dynamorio,code4bones/dynamorio,bl4ckic3/dynamorio,sigma-random/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,daksunt/dynamorio,code4bones/dynamorio,sigma-random/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,AmesianX/dynamorio,bl4ckic3/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,AmesianX/dynamorio