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.

Change-Id: I9ff51662bf0d2320961a7838da08f09552e9ef1e
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/41756
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>