Remove some confusing syntax pointed out by ghudson.
Remove some confusing syntax pointed out by ghudson.

* build/ac-macros/swig.m4
  test doesn't need square brackets around it.
  Prefer -o over two test invocations with ||



git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@850958 13f79535-47bb-0310-9956-ffa450edef68

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