Update: Tweak endiannes for f_utf_char_t.

Update: Tweak endiannes for f_utf_char_t.

I continue to forget that the f_utf_char_t is a big-endian format regardless of the host endiannes.
I then end up comparing the endiannes logic to normal operations and find discrepancies.
I waste a good bit of time to ultimately realize that the f_utf_char_t is not in host byte order.

Update the comments to better represent this situation.
I also noticed that the big endian bitwise operations are going in the wrong directory.
I could be wrong, but I think I need to do a left shift rather than a right shift.
Or perhaps, this only needs to be done on a big-endian system?
I need to test this logic on a big endian system.