Switch to gzip for build-wheel-mirror job
This avoids the need to install bzip2 / bzip2-libs for centos.
@@ -63,6 +63,6 @@ fi
# exercise for when the job is stable :) bz2 gave about 20%
# improvement over gzip in testing.
pushd ${LOGS}
-tar cvjf build-logs.tar.bz2 ./build
+tar zcvf build-logs.tar.gz ./build
rm -rf ./build
popd
