Versioned for 2.1.0.RC1
update the bnd build to the one that we used for 2.1.0.RC1

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
update the bnd build to the one with the API fix for #642

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
fixes #480: make sure bundles in cache are up-to-date 
http://github.com/bndtools/bndtools/issues/issue/480