Make the Python bindings testsuite be able to find the needed shared libraries on Cygwin. Needed to compensate for Windows' complete lack of library RPATHs.
Make the Python bindings testsuite be able to find the needed shared libraries
on Cygwin. Needed to compensate for Windows' complete lack of library RPATHs.

* subversion/bindings/swig/python/tests/run_all.py: On Cygwin, manipulate $PATH
    so that the relevant shared libraries are found.

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