[PATCH] erofs-utils: fix bitops fls_long

[Gao Xiang]

On 2024/7/9 10:20, Hongzhen Luo wrote:
> The __builtin_clz is for unsigned int, while it is applied
> to unsigned long. This fixes it by using __builtin_clzl.
> 

Does it impact any exist use cases?  If yes, we might need to
add some words in the commit message.

> Signed-off-by: Hongzhen Luo <hongzhen at linux.alibaba.com>

Reviewed-by: Gao Xiang <hsiangkao at linux.alibaba.com>

Thanks,
Gao Xiang