Remove "set -o pipefail" as it breaks bazel_sandboxing_test.

http://ci.bazel.io/job/bazel-tests/978/artifact/tests-node=linux-x86_64-variation=/src/test/shell/bazel/bazel_sandboxing_test/test.log/*view*/

PiperOrigin-RevId: 166345991
diff --git a/src/test/shell/bazel/remote_helpers.sh b/src/test/shell/bazel/remote_helpers.sh
index ff76585..6a5a877 100755
--- a/src/test/shell/bazel/remote_helpers.sh
+++ b/src/test/shell/bazel/remote_helpers.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -euo pipefail
+set -eu
 
 case "${PLATFORM}" in
   darwin|freebsd)