Fixed project_build - was ignoring return codes from external programs.
Fixed project_build - was ignoring return codes from external programs.



Former-commit-id: 2ab86703c2019adfe0db1a1ee6488fc47b8980a2
julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine