Renaming divertion of uptime from procps to /usr/bin/uptime.orig.procps to workaround...

Renaming divertion of uptime from procps to /usr/bin/uptime.orig.procps to workaround the nasty auto-alternative in procps.

This is very unfortunate, the procps package does *conditional* handling of
alternatives for /usr/bin/uptime depending on if there is a
/usr/bin/uptime.procps existing. For our case, this makes live very hard:

  * if there would always be an alternative, we could use register our
    live-uptime as an alternative and give it a higher priority.

  * if there would never be an alternative, we could simply divert the
    original uptime and use our live-uptime instead.

Now, since procps does a conditional alternative, we need to make sure
we do not hit this, hence using /usr/bin/uptime.orig.procps instead of
/usr/bin/uptime.procps when diverting /usr/bin/uptime in order to not
trap into the automatic alternative creation in procps maintainer scripts.