Don't allow silent failures for Xtensa binaries (#3156)

@tensorflow/micro

Do not allow programs, which are not unit tests, to silently fail when run using the Xtensa simulator. The generic benchmark application is one such program for which failures were not being reported.

Check the exit status of the simulator when running programs that are not unit tests.

bug=fixes #3155

Author: ddavis-2015

tensorflow/lite/micro/testing/test_xtensa_binary.sh

@@ -1,5 +1,5 @@
 #!/bin/bash -e
-# Copyright 2019 The TensorFlow Authors. All Rights Reserved.
+# Copyright 2025 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -26,7 +26,8 @@ declare -r MICRO_LOG_PATH=${TEST_TMPDIR}/$1
 declare -r MICRO_LOG_FILENAME=${MICRO_LOG_PATH}/logs.txt
 mkdir -p ${MICRO_LOG_PATH}
 
-xt-run $1 2>&1 | tee ${MICRO_LOG_FILENAME}
+xt-run --exit_with_target_code $1 2>&1 | tee ${MICRO_LOG_FILENAME}
+STATUS=${PIPESTATUS[0]}
 
 if [[ ${2} != "non_test_binary" ]]
 then
@@ -36,5 +37,6 @@ then
   else
     exit 1
   fi
+else
+  exit ${STATUS}
 fi
-