mtd: tests: Fix endian issue with CRC generation algorithm The calculation of the CRC in /tests/checkfs/makefiles.c was writing the CRC Into the produced files in host byte-order which would cause CRC validation to fail on big-endian systems as the validation is performed bytewise. Signed-off-by: Paul McGougan <pmcgougan AT topcon.com> [Brian: add endian.h] Signed-off-by: Brian Norris <computersforpeace@gmail.com>