xla

9a5cfac8 - Check if XLA_SANDBOX_BUIDL is unset before applying the bazel patch (#3590)

Check if XLA_SANDBOX_BUIDL is unset before applying the bazel patch (#3590) * Check if XLA_SANDBOX_BUIDL is unset before applying the bazel patch * Combine XLA_SHANDBOX_BUILD checks into a single if-else