git-dangling.t: Accept all output from "git clone"

Newer git versions write this to stderr instead of stdout, and even
older gits used another message. To simplify things, just allow
everything in the clone message. We still check for correct exit code,
and if the clone failed, the script will die after the next test anyway.

994e28f8-08a4-11e4-87b4-fefdb24f8e10
git-dangling.t: Update test for new output in f994137

Commit f994137 ("git-dangling: Define $progname and make the visual
output more verbose", 2014-05-31 22:39:08 +0200) added "git-dangling:
Created " at the beginning of output lines when new commit-* branches
were created.

e6877510-08a5-11e4-bd95-fefdb24f8e10
Merge branch 'fix-git-dangling-tests'

Update tests/git-dangling.t due to changes in git and git-dangling.

* fix-git-dangling-tests:
  git-dangling.t: Update test for new output in f994137
  git-dangling.t: Accept all output from "git clone"

c969adc0-08a7-11e4-9309-fefdb24f8e10