LU-12705 build: fix building fail against Power9 little endian

LU-12705 build: fix building fail against Power9 little endian

We use "%ll[dux]" for __u64 variable as an input/output modifier,
this may cause building error on some architectures which use "long"
for 64-bit types, for example, Power9 little endian.
Here add necessary typecasting (long long/unsigned long long) to
make the build correct.

Test-Parameters: trivial
Change-Id: I2e8569f4ac14f7d328a29d153ff57c7834cabc46
Signed-off-by: Gu Zheng <gzheng@ddn.com>
Reviewed-on: https://review.whamcloud.com/36007
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Li Xi <lixi@ddn.com>