Revert "Disable all jobs for testing"

This reverts commit c7887978a35db2b5c0113269268cfc71775aeef2.
diff --git a/mbedtls-dockerfile-builder.yaml b/mbedtls-dockerfile-builder.yaml
index 12158e4..9747c2b 100644
--- a/mbedtls-dockerfile-builder.yaml
+++ b/mbedtls-dockerfile-builder.yaml
@@ -1,7 +1,7 @@
 - job:
     concurrent: true
     description: Dockerfile building job
-    disabled: true
+    disabled: false
     dsl: |-
       timestamps {
           stage('build-dockerfiles') {