FYI: fix Automake rebuilding rules

[Ralf Wildenhues]

Applied to master.

Cheers,
Ralf

    * configure.ac (ACLOCAL, AUTOMAKE): Fix quoting for rebuilding
    rules, if the absolute build directory name contains white space.

diff --git a/configure.ac b/configure.ac
index 9e08204..1bf5577 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 # Process this file with autoconf to produce a configure script.
 
-# Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006,
+# Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
 # 2004, 2006, 2007  Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
@@ -49,8 +49,8 @@ AC_SUBST([pkgvdatadir], ["\${datadir}/$PACKAGE-$APIVERSION"])
 
 # $AUTOMAKE and $ACLOCAL are always run after a `cd $top_srcdir',
 # hence `.' is really what we want for perllibdir, libdir, and acdir.
-ACLOCAL="perllibdir=`pwd`\"/lib$PATH_SEPARATOR./lib\" `pwd`/aclocal --acdir=m4 
-I m4"
-AUTOMAKE="perllibdir=`pwd`\"/lib$PATH_SEPARATOR./lib\" `pwd`/automake 
--libdir=lib"
+ACLOCAL="perllibdir=\"`pwd`/lib$PATH_SEPARATOR./lib\" \"`pwd`/aclocal\" 
--acdir=m4 -I m4"
+AUTOMAKE="perllibdir=\"`pwd`/lib$PATH_SEPARATOR./lib\" \"`pwd`/automake\" 
--libdir=lib"
 
 AC_PATH_PROG(PERL, perl)
 if test -z "$PERL"; then