(skopeo copy) will soon ALWAYS require a present policy file. So,
install one by (make install), and ensure that integration tests do so
as well.
Also simplifies the usage of install(1) a bit.
So that people don't need to install all dependencies just to build.
Make it so that "make binary" does nothing if nothing changed.
Remove ${DEST}
Signed-off-by: Doug Davis <dug@us.ibm.com>