LU-17254 lnet: Fix ofed detection with specific kernel version

LU-17254 lnet: Fix ofed detection with specific kernel version

Improve OFED configure step with LNET when the kernel version
is using special characters that could be interprated in regexp
mode.

This is not uncommon in Debian world to have '+' in kernel version.

Lustre-change: https://review.whamcloud.com/52949
Lustre-commit: b83156304df2d418aadb5d3dfd5f570ef72a7e2e

Test-parameters: trivial
Change-Id: Ia3da59c74d8c2e59e16525dd50c7b83c2b5fada8
Signed-off-by: Aurelien Degremont <adegremont@nvidia.com>
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/53021
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Colin Faber <cfaber@ddn.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>