Merge pull request #257 from Gottox/master

rename odroid packages to comply to the platform-naming-rules
odroid-u2-base: fix provides/replaces.
kernel-rpi: renamed to rpi-kernel to follow platform naming rules.
rpi-base-files: renamed to rpi-base to follow platform naming rules.
rpi-base: depends on arch pkgs, so drop noarch.
odroid-u2-base: depend on odroid-u2-kernel and drop noarch.
odroid-u2-base: only for armv7l.
rpi-base: depends on rpi-firmware not linux-firmware.
base-system: drop arm specific pkgs and depend on linux just on x86.
linux: drop arm specific settings, this is x86-only for now.
faac: cross build support.
libplist: cross build support.
nspr: cross buid support.
odroid-u2-base: fixing boot with boot-auto_edid.scr