Re-enable PR Head/Merge jobs on the staging

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: If7a7c6619d9d3e7aab87d07b7461de5f7c618e5b
diff --git a/mbed-tls-pr-head.yaml b/mbed-tls-pr-head.yaml
index fa822ac..9d37b02 100644
--- a/mbed-tls-pr-head.yaml
+++ b/mbed-tls-pr-head.yaml
@@ -2,7 +2,7 @@
     name: mbed-tls-pr-head
     description: 'Job for testing mbed tls PR heads'
     project-type: multibranch
-    disabled: true
+    disabled: false
     prune-dead-branches: true
     days-to-keep: 60
     num-to-keep: 1000
diff --git a/mbed-tls-pr-merge.yaml b/mbed-tls-pr-merge.yaml
index 84c8fea..1af1d8c 100644
--- a/mbed-tls-pr-merge.yaml
+++ b/mbed-tls-pr-merge.yaml
@@ -1,7 +1,7 @@
 - job:
     name: mbed-tls-pr-merge
     description: 'Job for testing PRs merged with the target branch head'
-    disabled: true
+    disabled: false
     project-type: multibranch
     prune-dead-branches: true
     days-to-keep: 60