LU-4669 type: change "%llx" to "LPX64”

LU-4669 type: change "%llx" to "LPX64”

This patch fixes the following compile errors by using "LPX64”:
error: format '%llx' expects type 'long long unsigned int',
       but argument 5 has type '__u64'
error: format '%#llx' expects type 'long long unsigned int',
       but argument 3 has type '__u64'

This patch is back-ported from the following one:
Lustre-commit: f1eaf5e99aa9093b7a0fac7ae11e741560f64c31
Lustre-change: http://review.whamcloud.com/9811

Signed-off-by: Jian Yu <jian.yu@intel.com>
Change-Id: I0637f2c0a1e57cf8ab89d8fe9c905145724fded3
Reviewed-on: http://review.whamcloud.com/12432
Tested-by: Jenkins
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>