tests/test-issue1089.t

perf: rename perfrevlog to perfrevlogrevisions

We have a couple of commands beginning with "perfrevlog." The
actual "perfrevlog" command actually measures resolving the fulltext
of multiple revisions. So let's rename it to reflect what it actually
does.

https://bz.mercurial-scm.org/1089

  $ hg init
  $ mkdir a
  $ echo a > a/b
  $ hg ci -Am m
  adding a/b

  $ hg rm a
  removing a/b (glob)
  $ hg ci -m m a

  $ mkdir a b
  $ echo a > a/b
  $ hg ci -Am m
  adding a/b

  $ hg rm a
  removing a/b (glob)
  $ cd b

Relative delete:

  $ hg ci -m m ../a

  $ cd ..