Development 2 build 5

Changed

• Build: Build with make
• Build: Split kernel files for maintaining
• Build: Update buildroot 2018-11.1
• Build: Enable LTO for GCC/Binutils
• OS: Add support for RFLink
• OS: Make use of hardware rng devices
• OS: Run ash as login shell, so $PATH is set correctly
• OVA: Make image bootable from virtio disk
• Intel NUC: Initial support
• Orange Pi Prime: Initial support