cmake CTEST_MEMORYCHECK_COMMAND_OPTIONS examples

HDFGroup/hdf5 HDF5Examples/CTestConfig.cmake :38

set (CTEST_MEMORYCHECK_COMMAND_OPTIONS "-v --tool=memcheck --leak-check=full --track-fds=yes --num-callers=50 --show-reachable=yes --track-origins=yes --malloc-fill=0xff --free-fill=0xfe")