LU-17028 build: add support for openEuler 20.03 LTS

LU-17028 build: add support for openEuler 20.03 LTS

Add build support for openEuler 20.03 LTS.
And e2fsprogs rpm conflicts with openEuler's e2fsprogs-help man rpm,
should obsolete to replace it.

Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Change-Id: I12348e02cfec918167b1949205b86274a1651c27
Reviewed-on: https://review.whamcloud.com/c/tools/e2fsprogs/+/51956
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>