1. Rename file name from openeuler-xx to custom-xx.
2. Mofify all openeuler string to @VENDOR@ and define
it during building RPM.
Change-Id: Ia55ce06194986bc86ed2c4f5328cf3c965ea9d04
Signed-off-by: Chenxi Mao <chenxi.mao@suse.com>
(cherry picked from commit 1889cc183b9c0497850337a3520f5b660ff87b2d)