xenomai: add license info

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/xenomai/xenomai.mk

@@ -12,6 +12,9 @@ endif
 
 XENOMAI_SITE = http://download.gna.org/xenomai/stable/
 XENOMAI_SOURCE = xenomai-$(XENOMAI_VERSION).tar.bz2
+XENOMAI_LICENSE = headers: GPLv2+ with exception, libraries: LGPLv2.1+, kernel: GPLv2+, docs: GFDLv1.2+, ipipe patch and can driver: GPLv2
+# GFDL is not included but refers to gnu.org
+XENOMAI_LICENSE_FILES = debian/copyright include/COPYING src/skins/native/COPYING ksrc/nucleus/COPYING
 
 XENOMAI_INSTALL_STAGING = YES