ps: Support muitiple ps arguments
ps: Support muitiple ps arguments

Before patch:
 | # ./runc ps test -- -e -f
 |   PID TTY          TIME CMD
 | 29046 pts/2    00:00:00 sh  <-- The -f option was skipped
 | #

After patch:
 | # ./runc ps test -- -e -f
 | UID        PID  PPID  C STIME TTY          TIME CMD
 | root     29046 29038  0 Jul06 pts/2    00:00:00 sh
 | #

Reported-by: Qiang Huang <h.huangqiang@huawei.com>

Signed-off-by: Zhao Lei <aacdd228f50c574b28b524b23f12fb9d52d6e0e3@cn.fujitsu.com>

opencontainers/runc,keloyang/runc,hqhq/runc,maxamillion/runc,docker/runc,justincormack/runc,estesp/runc,estesp/runc,nkwilson/runc,avagin/runc,keloyang/runc,adrianreber/runc,kolyshkin/runc,stefanberger/runc,xiaochenshen/runc,mikebrow/runc,mikebrow/runc,rajasec/runc,rhatdan/runc,nkwilson/runc,kolyshkin/runc,opencontainers/runc,cloudfoundry-incubator/runc,estesp/runc,opencontainers/runc,coolljt0725/runc,dqminh/runc,dqminh/runc,shishir-a412ed/runc,vbatts/runc,WeiZhang555/runc,maxamillion/runc,justincormack/runc,keloyang/runc,crosbymichael/runc,adrianreber/runc,mheon/runc,vbatts/runc,mYmNeo/runc,hqhq/runc,nkwilson/runc,crosbymichael/runc,stefanberger/runc,xiaochenshen/runc,xiaochenshen/runc,sunyuan3/runc,laijs/runc,opencontainers/runc,vbatts/runc,WeiZhang555/runc,rhatdan/runc,docker/runc,cloudfoundry-incubator/runc,dqminh/runc,rhatdan/runc,coolljt0725/runc,kolyshkin/runc,mYmNeo/runc,WeiZhang555/runc,rajasec/runc,maxamillion/runc,wking/runc,jhowardmsft/runc,laijs/runc,stefanberger/runc,sunyuan3/runc,docker/runc,hqhq/runc,kolyshkin/runc,shishir-a412ed/runc,mheon/runc,sunyuan3/runc,mheon/runc,jhowardmsft/runc,cloudfoundry-incubator/runc,wking/runc,rhatdan/runc,jhowardmsft/runc,mYmNeo/runc,adrianreber/runc,avagin/runc,rajasec/runc,cyphar/runc,crosbymichael/runc,coolljt0725/runc,dqminh/runc,wking/runc,justincormack/runc,cyphar/runc,mikebrow/runc,avagin/runc,laijs/runc,shishir-a412ed/runc,cyphar/runc