Jenkinsfile: collect junit.xml for all architectures

Jenkins groups them per stage, so collecting them for all architectures
is possible (without them conflicting or becoming ambiguous)

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Jenkinsfile

@@ -335,6 +335,11 @@ pipeline {
                                   hack/test/unit
                                 '''
                             }
+                            post {
+                                always {
+                                    junit testResults: 'bundles/junit-report.xml', allowEmptyResults: true
+                                }
+                            }
                         }
                         stage("Integration tests") {
                             environment { TEST_SKIP_INTEGRATION_CLI = '1' }
@@ -496,6 +501,11 @@ pipeline {
                                   hack/test/unit
                                 '''
                             }
+                            post {
+                                always {
+                                    junit testResults: 'bundles/junit-report.xml', allowEmptyResults: true
+                                }
+                            }
                         }
                         stage("Integration tests") {
                             environment { TEST_SKIP_INTEGRATION_CLI = '1' }