Jenkins: Add timestamps wrapper

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Idfbf9ea149d664b5451b3a938fcc4e5d4e601485
diff --git a/jenkins/static.jpl b/jenkins/static.jpl
index 95537a3..a7fe36d 100644
--- a/jenkins/static.jpl
+++ b/jenkins/static.jpl
@@ -23,22 +23,24 @@
 
 def status = 1
 
-stage("Static Checks") {
-  def checks = [:]
-  checks["cppcheck"] = trigger("tf-m-cppcheck")
-  checks["checkpatch"] = trigger("tf-m-checkpatch")
-  checks["static-checks"] = trigger("tf-m-static-checks")
-  try {
-    parallel(checks)
-  } catch (Exception e) {
-    status = -1
-    echo "Failed static checks, continuing with build."
+timestamps {
+  stage("Static Checks") {
+    def checks = [:]
+    checks["cppcheck"] = trigger("tf-m-cppcheck")
+    checks["checkpatch"] = trigger("tf-m-checkpatch")
+    checks["static-checks"] = trigger("tf-m-static-checks")
+    try {
+      parallel(checks)
+    } catch (Exception e) {
+      status = -1
+      echo "Failed static checks, continuing with build."
+    }
   }
-}
-stage("Trigger Build") {
-  parallel(["build":trigger("tf-m-build-and-test")])
-  // If previously failed at static checks, mark this as a failure
-  if (status < 0 ) {
-    error("Failing due to failed static checks.")
+  stage("Trigger Build") {
+    parallel(["build":trigger("tf-m-build-and-test")])
+    // If previously failed at static checks, mark this as a failure
+    if (status < 0 ) {
+      error("Failing due to failed static checks.")
+    }
   }
 }