[CORE] Increase the buddy allocator maximum chunk size to 8 MB.

This increases the maximum block size of contiguous memory, allowing contiguous
memory blocks of 8 MB instead of 2.

Signed-off-by: Jimmy Durand Wesolowski <jimmy.durand-wesolowski@openwide.fr>
[LIBS] Adding the bitrev library.

Signed-off-by: Jimmy Durand Wesolowski <jimmy.durand-wesolowski@openwide.fr>