Fix the only test that fails when svn-test-work is a symlink elsewhere.
Fix the only test that fails when svn-test-work is a symlink elsewhere.

* subversion/tests/cmdline/commit_tests.py
  (commit_from_long_dir): Use os.path.realpath to get abs_wc_dir, as
    that's what svn does.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion