TUN-6984: Add bash set x to improve visibility during builds

Author: sudarshan-reddy

.teamcity/build-macos.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -euo pipefail
+set -euxo pipefail
 
 if [[ "$(uname)" != "Darwin" ]] ; then
     echo "This should be run on macOS"