When testing with packing enabled, don't depend on the cwd in the hook script.
When testing with packing enabled, don't depend on the cwd in the hook
script.

Found by: commit_tests.py

* subversion/tests/cmdline/svntest/main.py
  (create_repos):
    Use the absolute path to the repository in the hook script.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@875583 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion