test_shunt: properly generate path of valgrind output
test_shunt: properly generate path of valgrind output

jmptrader/simplehttp,jtsui/leveldb-daemon,bitly/simplehttp,jtsui/leveldb-daemon,jmptrader/simplehttp,jtsui/leveldb-daemon,bitly/simplehttp,jmptrader/simplehttp,bitly/simplehttp