Update UtestPlatform.cpp
Update UtestPlatform.cpp

Create std::nothrow constant
offa/cpputest,cpputest/cpputest,offa/cpputest,basvodde/cpputest,offa/cpputest,cpputest/cpputest,offa/cpputest,basvodde/cpputest,basvodde/cpputest,basvodde/cpputest,cpputest/cpputest,cpputest/cpputest