xenomai: remove unnecessary autoreconf

As xenomai release tarballs ship with a configure script, there is only a
need for autoreconfiguring when patches are applied.

The last patch was removed with git commit
de993bc23aab100e16026cb4cabebed48b9e1989 but the AUTORECONF line remained.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 4219c58c386fdd351eb75185fa851addd63a75ed)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/xenomai/xenomai.mk

@@ -24,8 +24,6 @@ XENOMAI_LICENSE_FILES = debian/copyright include/COPYING kernel/cobalt/COPYING \
 
 XENOMAI_DEPENDENCIES = host-pkgconf
 
-# 0002-boilerplate-build-obstack-support-conditionally.patch
-XENOMAI_AUTORECONF = YES
 
 XENOMAI_INSTALL_STAGING = YES
 XENOMAI_INSTALL_TARGET_OPTS = DESTDIR=$(TARGET_DIR) install-user