angstrom-next: Use qemu 1.5.0

Signed-off-by: Khem Raj <raj.khem@gmail.com>
psplash: Correct the SRC_URI

It was pointing to wrong reponame  on yp dot org

Signed-off-by: Khem Raj <raj.khem@gmail.com>
bigbuckbunny: Add LIC_FILES_CHKSUM and use right version of CC-BY

Signed-off-by: Khem Raj <raj.khem@gmail.com>