vmstat: do not delete guest time form user time in non-wide

hdzhoujierequested to merge
hdzhoujie/procps:master into master

In non-wide format, if the virtual machine time is not zero, the sumof cpu utilization of vmstat is not 100%.

signed-off-by: zhoujie zhoujie133@huawei.com

Edited by hdzhoujie

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