Use AC_CONFIG_AUX_DIR to clean up the toplevel directory

a little.

Fixed a related bug in the toplevel Makefile.am.

Added the build-aux directory to .gitignore.

.gitignore

@@ -9,6 +9,7 @@ Makefile.in
 /autom4te.cache
 /Doxyfile
 /aclocal.m4
+/build-aux
 /compile
 /config.guess
 /config.h

Makefile.am

@@ -16,7 +16,6 @@ SUBDIRS += src po tests
 
 EXTRA_DIST = \
 	version.sh \
-	config.rpath \
 	Doxyfile.in \
 	extra \
 	doc \

configure.ac

@@ -20,8 +20,9 @@ AC_PREREQ([2.61])
 AC_INIT([XZ Utils], m4_esyscmd([/bin/sh version.sh]),
 	[lasse.collin@tukaani.org], [xz])
 AC_CONFIG_SRCDIR([src/liblzma/common/common.h])
-AC_CONFIG_HEADER([config.h])
+AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_HEADER([config.h])
 
 PACKAGE_HOMEPAGE=http://tukaani.org/xz/
 AC_DEFINE_UNQUOTED([PACKAGE_HOMEPAGE], ["$PACKAGE_HOMEPAGE"],