libxslt: fix build if ansidecl.h is not installed, disable ansidecl.h support

Signed-off-by: Stephan Raue <stephan@openelec.tv>
atv-bootloader: convert to new package format

Signed-off-by: Stephan Raue <stephan@openelec.tv>
darwin-cross: convert to new package format, move to 'toolchain', handle as own toolchain

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv