build: add a build-time check the builtins bundle fits

Check the size of the constructed cpio archive against the space allocated
to hold it at boot. This potentially avoids confusion if the boot process
does something stupid (e.g. like Renode blindly loading a file).

Change-Id: Ib4bc451bd5822ddf3ab3e06f6c0aaaeffae11d63
1 file changed