autoconf: use dummy autopoint

We currently don't build a host-gettext package, so when a package using
gettext is autoreconf'ed, we end up using autopoint from the host.

Autopoint unfortunately requires CVS, so if that isn't available autoreconf
fails.

From reading:

http://www.gnu.org/software/gnulib/manual/html_node/gettextize-and-autopoint.html

It seems that we don't really need to rerun autopoint, so fix it by
passing autopoint=/bin/true instead.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/autoconf/autoconf.mk

@@ -23,4 +23,4 @@ $(eval $(call AUTOTARGETS,package,autoconf,host))
 # variables used by other packages
 AUTOCONF:=$(HOST_DIR)/usr/bin/autoconf
 AUTOHEADER:=$(HOST_DIR)/usr/bin/autoheader
-AUTORECONF=$(HOST_CONFIGURE_OPTS) ACLOCAL="$(ACLOCAL)" AUTOCONF="$(AUTOCONF)" AUTOHEADER="$(AUTOHEADER)" AUTOMAKE="$(AUTOMAKE)" $(HOST_DIR)/usr/bin/autoreconf -f -i -I "$(ACLOCAL_DIR)" -I "$(ACLOCAL_HOST_DIR)"
+AUTORECONF=$(HOST_CONFIGURE_OPTS) ACLOCAL="$(ACLOCAL)" AUTOCONF="$(AUTOCONF)" AUTOHEADER="$(AUTOHEADER)" AUTOMAKE="$(AUTOMAKE)" AUTOPOINT=/bin/true $(HOST_DIR)/usr/bin/autoreconf -f -i -I "$(ACLOCAL_DIR)" -I "$(ACLOCAL_HOST_DIR)"