Merge branch 'kselftest-rtnetlink'

Daniel Mendes says:

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kselftest: rtnetlink: add additional command line options

Many other tests implement options like verbose, pause, and pause
on failure. These patches just add these options to rtnetlink.sh.
The same conventions are used as the tests that already have this
functionality: eg verbose is 0 or 1 but PAUSE is "yes" or "no".
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Signed-off-by: David S. Miller <davem@davemloft.net>