config/version: set OS_VERSION to 4.2

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xbmc: dont depend on package 'faad2' anymore

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xbmc-master: dont depend on package 'faad2' anymore

Signed-off-by: Stephan Raue <stephan@openelec.tv>
remove package 'faad2'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
SDL: disable nasm support

Signed-off-by: Stephan Raue <stephan@openelec.tv>
toolchain: dont build package 'nasm'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
remove package: nasm
scripts/build: cosmetics
scripts/clean: do not clean up more than expected...