scripts: Use XC_ARCH/XC_OS to limit what arch/os combo is built
scripts: Use XC_ARCH/XC_OS to limit what arch/os combo is built

zyegfryed/packer,TranscendComputing/packer,suma/packer,patricklucas/packer,zyegfryed/packer,suma/packer,Kaixiang/packer,patricklucas/packer,zyegfryed/packer,Kaixiang/packer,Kaixiang/packer,suma/packer,suma/packer,patricklucas/packer,TranscendComputing/packer,patricklucas/packer,TranscendComputing/packer,zyegfryed/packer,TranscendComputing/packer,Kaixiang/packer