Clean up Ruby part configuration script.
Clean up Ruby part configuration script.

* build/ac-macros/swig.m4 (SVN_FIND_SWIG):
  - Use changequote() to use "[]" in Ruby script.
  - Store configurations of ruby to rbconfig_XXX and use them to clean up.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@862894 13f79535-47bb-0310-9956-ffa450edef68

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