lib: Add CCAN headers for endian helpers
Signed-off-by: Sam Mendoza-Jonas <sam@mendozajonas.com>
- [DH] lib/ccan/endian/.depends
- [DH] lib/ccan/endian/LICENSE
- [DH] lib/ccan/endian/_info
- [DH] lib/ccan/endian/endian.h
- [DH] lib/ccan/endian/test/compile_ok-constant.c
- [DH] lib/ccan/endian/test/run.c