Throw exception for build stage

This is required so Jenkins will properly mark the build failed on valid script errors.

Signed-off-by: brianherrera <briher@amazon.com>

scripts/build/Jenkins/Jenkinsfile

@@ -525,6 +525,8 @@ def CreateSingleNode(Map pipelineConfig, def platform, def build_job, Map envVar
                                 catch (Exception e) {
                                     if (envVars['NONBLOCKING_STEP']?.toBoolean()) {
                                         unstable(message: "Build step ${build_step} failed but it's a non-blocking step in build job ${build_job.key}")
+                                    } else {
+                                        throw e
                                     }
                                 }
                             }