LU-14385 utils: add range check to strtol() in lfs.c

LU-14385 utils: add range check to strtol() in lfs.c

Most of the strtol() and strtoll() functions called
in lfs.c did not check the range of the return value.
This patch fixes those issues.

Lustre-change: https://review.whamcloud.com/41756
Lustre-commit: b217593a9e68d15e34c257b8d9485d34d3ccbbec

Test-Parameters: trivial
Change-Id: I9ff51662bf0d2320961a7838da08f09552e9ef1e
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/46265
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>