Fix incorrect quoting in swig.m4.
Fix incorrect quoting in swig.m4.

* build/ac-macros/swig.m4
  Use [] not "".



git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@850130 13f79535-47bb-0310-9956-ffa450edef68

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