On the pin-externals test, make the regression test account for platform-specific  local paths.
On the pin-externals test, make the regression test account for
platform-specific  local paths.

* subversion/tests/cmdline/externals_tests.py
  (copy_pin_externals): Use sbox.ospath() to obtain working copy target paths,
   rather than assuming paths separated with forward slashes.


git-svn-id: 50c5f5df37af4354ae6e67714fc94b8d09273154@1654549 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion