ostro-image-swupd.bb: Add AppFW sample app in qa-bundle-b

To verify IOTOS-1672 in Ostro OS build , we need one bundle which
includes AppFW app .

Signed-off-by: Wu Dawei <daweix.wu@intel.com>

Author: daweiwu

meta-ostro/recipes-image/images/ostro-image-swupd.bb

@@ -85,6 +85,7 @@ BUNDLE_CONTENTS[qa-bundle-a] = " \
 BUNDLE_CONTENTS[qa-bundle-b] = " \
     hello-bundle-b \
     hello-bundle-s \
+    example-app-c  \
 "
 
 # When swupd bundles are enabled, choose explicitly which images