Recipe builds should link to the resultant files

[William Grant]

BinaryPackageBuild pages have a "Built files" section down the bottom, listing the files produced by the build. SourcePackageRecipeBuilds should do the same. The "Result" and "Binary builds" sections from the "Build details" portlet should probably also go down there somewhere, since that's where similar data is for binary builds, and the "Build details" portlet is otherwise static metadata on how it was built.