tests/test-debugindexdot.t

tests: increase test-https malform error glob

The recently introduced (ecc9b788fd690a0a) test around malformed pem files hard
codes an error message which doesn't appear to be cross platform agnostic. On
our machines (centos6 if it matters) the test output differs:

-  abort: error: unknown error* (glob)
+  abort: error: _ssl.c:330: error:00000000:lib(0):func(0):reason(0)

This patch increases the glob to cover the entire error message.

Just exercise debugindexdot
Create a short file history including a merge.
  $ hg init t
  $ cd t
  $ echo a > a
  $ hg ci -qAm t1 -d '0 0'
  $ echo a >> a
  $ hg ci -m t2 -d '1 0'
  $ hg up -qC 0
  $ echo b >> a
  $ hg ci -m t3 -d '2 0'
  created new head
  $ HGMERGE=true hg merge -q
  $ hg ci -m merge -d '3 0'

  $ hg debugindexdot .hg/store/data/a.i
  digraph G {
  	-1 -> 0
  	0 -> 1
  	0 -> 2
  	2 -> 3
  	1 -> 3
  }

  $ cd ..