Add pipefail to inline commands to run tests in CI

Author: mokagio

.buildkite/pipeline.yml

@@ -116,6 +116,8 @@ steps:
             exit 0
           fi
 
+          set -o pipefail
+
           .buildkite/commands/shared-set-up.sh
           xcodebuild \
             -scheme Keystone \
@@ -134,6 +136,8 @@ steps:
             exit 0
           fi
 
+          set -o pipefail
+
           .buildkite/commands/shared-set-up.sh
           xcodebuild \
             -scheme WordPressData \