Add example recipes to build a single image

Sample recipes with new recipe action

Fixes: APERTIS-5675

apertis-sample-image-sdk.yaml

+{{- $architecture := "amd64" }}
+{{- $type := "basesdk" }}
+{{- $mirror := "https://repositories.apertis.org/apertis/" }}
+{{- $suite := "v2019dev0" }}
+{{- $timestamp := "00000000.0" }}
+{{- $image := (printf "apertis-sample-sdk-%s-%s-%s_%s" $suite  $type $architecture $timestamp) }}
+
+{{- $devrootpack := or .devrootpack "disabled" }}
+
+architecture: {{ $architecture }}
+
+actions:
+  # Create base rootfs for the Base SDK
+  - action: recipe
+    description: Create ospack for {{ $suite }} {{ $type }} {{ $architecture }}
+    recipe: apertis-ospack-{{ $type }}.yaml
+    variables:
+      type: {{ $type }}
+      mirror: {{ $mirror }}
+      suite: {{ $suite }}
+      timestamp: {{ $timestamp }}
+      pack: false
+
+  # Package up everything in a image for VirtualBox
+  - action: recipe
+    description: Create image {{ $image }} for {{ $suite }} {{ $type }} {{ $architecture }}
+    recipe: apertis-image-sdk.yaml
+    variables:
+      type: {{ $type }}
+      mirror: {{ $mirror }}
+      suite: {{ $suite }}
+      timestamp: {{ $timestamp }}
+      image: {{ $image }}
+      devrootpack: {{ $devrootpack }}
+      unpack: false