Fixed ustring_utf_8_decode_test.cpp to output formatted byte sequence for when test fail
Fixed ustring_utf_8_decode_test.cpp to output formatted byte sequence for when test fail

pfi/pficommon,takei-yuya/pficommon,takei-yuya/pficommon,takei-yuya/pficommon,pfi/pficommon,retrieva/pficommon,pfi/pficommon,pfi/pficommon,retrieva/pficommon,retrieva/pficommon,takei-yuya/pficommon,retrieva/pficommon,retrieva/pficommon