
Add dib image-build for Fedora 21. This passes config validation in I250ea4959740cfc4650e9057caba09ae7bc25768 and has fixed the issues that lead to I2671e05e44b8a311f00dec024e67cbdc2864185c (there is no need to specify the path to the image as done in that change, d-i-b inbuilt paths + some redirects on the upstream server get you to the right image now) Change-Id: I197312214d6e849f2047363a51b1c71829982743