If an XFail test throws a Skip exception, then treat it as a skip.
If an XFail test throws a Skip exception, then treat it as a skip.

Currently, XFail converts a "skip" result into a "pass".  But a "skip"
should remain a "skip".  (But since the pre-converted value is used to
choose what test result to output, this modification does not change
the printed output of any tests.)

* subversion/tests/cmdline/svntest/testcase.py (XFail.convert_result):
  Convert pass->fail, fail->pass, but leave skip->skip unchanged.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@859392 13f79535-47bb-0310-9956-ffa450edef68

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