Small fix to create the build folder if necessary.
Small fix to create the build folder if necessary.

msis/moos-ivp-msis,ClementAubry/moos-ivp-msis,nicolaje/moos-ivp-ciscrea,nicolaje/moos-ivp-ciscrea,nicolaje/moos-ivp-ciscrea,nicolaje/moos-ivp-ciscrea,msis/moos-ivp-msis,ClementAubry/moos-ivp-msis,msis/moos-ivp-msis,ClementAubry/moos-ivp-msis,ClementAubry/moos-ivp-msis,ClementAubry/moos-ivp-msis,nicolaje/moos-ivp-ciscrea,msis/moos-ivp-msis,msis/moos-ivp-msis,ClementAubry/moos-ivp-msis,nicolaje/moos-ivp-ciscrea,msis/moos-ivp-msis