Add some missing json annotations.

* Without these annotations kubebuilder's controller-gen will choke
  trying to generate code from these structs which makes it difficult
  to embed PipelineRun into other custom resources.

pkg/apis/pipeline/pod/template.go

@@ -95,7 +95,7 @@ type Template struct {
 	SchedulerName string `json:"schedulerName"`
 
 	// ImagePullSecrets gives the name of the secret used by the pod to pull the image if specified
-	ImagePullSecrets []corev1.LocalObjectReference
+	ImagePullSecrets []corev1.LocalObjectReference `json:"imagePullSecrets"`
 
 	// HostNetwork specifies whether the pod may use the node network namespace
 	// +optional

pkg/apis/pipeline/v1beta1/param_types.go

@@ -87,9 +87,9 @@ var AllParamTypes = []ParamType{ParamTypeString, ParamTypeArray}
 // Used in JSON unmarshalling so that a single JSON field can accept
 // either an individual string or an array of strings.
 type ArrayOrString struct {
-	Type      ParamType // Represents the stored type of ArrayOrString.
-	StringVal string
-	ArrayVal  []string
+	Type      ParamType `json:"type"` // Represents the stored type of ArrayOrString.
+	StringVal string    `json:"stringVal"`
+	ArrayVal  []string  `json:"arrayVal"`
 }
 
 // UnmarshalJSON implements the json.Unmarshaller interface.