Fix examples to include context directory
Fix examples to include context directory

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #977
Approved by: TomSweeneyRedHat

nalind/buildah-1,nalind/buildah-1,nalind/buildah,projectatomic/buildah,projectatomic/buildah,rhatdan/buildah,rhatdan/buildah,TomSweeneyRedHat/buildah,TomSweeneyRedHat/buildah,projectatomic/buildah,nalind/buildah,rhatdan/buildah,ipbabble/buildah,nalind/buildah-1,ipbabble/buildah,TomSweeneyRedHat/buildah