Structs which are both packed and aligned fail to compile

[TheDan64]

For example, the linux headers have this struct:

struct xregs_state {
    struct fxregs_state i387;
    struct xstate_header header;
    u8 extended_state_area[0];
} __attribute__ ((packed, aligned(64)));

Which will fail to compile when translated due to being #[repr(C, packed, align(64)] but a struct cannot be packed and aligned in rust. This is blocked on rust-lang/rust#59154

[ahomescu]

Fixed in 49d2b57.