ENH: build.py script returns 1 on failure enabling external tools to note failure of build or test
ENH: build.py script returns 1 on failure enabling external tools to note failure of build or test

Former-commit-id: f925f744498cbc4fd4ff3b5a1a749734c35467a6
gtcasl/gpuocelot,3upperm2n/gpuocelot,3upperm2n/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,gtcasl/gpuocelot