Fix
bug 689555 - build bustage due to binary xpidl being removed from mozilla-central, r=Callek
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,15 +1,14 @@
dnl
dnl Local autoconf macros used with mozilla
dnl The contents of this file are under the Public Domain.
dnl
builtin(include, mozilla/build/autoconf/glib.m4)dnl
-builtin(include, mozilla/build/autoconf/libIDL.m4)dnl
builtin(include, mozilla/build/autoconf/nspr.m4)dnl
builtin(include, mozilla/build/autoconf/nss.m4)dnl
builtin(include, mozilla/build/autoconf/pkg.m4)dnl
builtin(include, mozilla/build/autoconf/freetype2.m4)dnl
builtin(include, mozilla/build/autoconf/codeset.m4)dnl
builtin(include, mozilla/build/autoconf/altoptions.m4)dnl
builtin(include, mozilla/build/autoconf/mozprog.m4)dnl
builtin(include, mozilla/build/autoconf/acwinpaths.m4)dnl