CI: Set appveyor fast_finish to speed up build when one fails
CI: Set appveyor fast_finish to speed up build when one fails

StalderT/open62541,JGrothoff/open62541,StalderT/open62541,JGrothoff/open62541,open62541/open62541,jpfr/open62541,open62541/open62541,JGrothoff/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541,jpfr/open62541,jpfr/open62541,StalderT/open62541,StalderT/open62541,open62541/open62541