Make the Windows crash handler work with DLL builds.
Make the Windows crash handler work with DLL builds.

* build/generator/gen_win.py
  (WinGeneratorBase.get_win_defines): Tweak the condition used to determine
   whether SVN_USE_WIN32_CRASHHANDLER should be defined.

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