fixed condition check for c++11 vs c++03 and earlier; fixed typo in name of unordered_map
fixed condition check for c++11 vs c++03 and earlier; fixed typo in name of unordered_map

hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg