Fix issue 1453, "Configure fails when parent directory contains spaces".
Fix issue 1453, "Configure fails when parent directory contains spaces".

* configure.in
  Protect references to $abs_srcdir with double-quotes.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@846698 13f79535-47bb-0310-9956-ffa450edef68

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