package/libbsd: bump version

... and switch to using .tar.xz as that's all upstream is providing now.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libbsd/libbsd.mk

@@ -4,7 +4,8 @@
 #
 ################################################################################
 
-LIBBSD_VERSION = 0.4.2
+LIBBSD_VERSION = 0.6.0
+LIBBSD_SOURCE = libbsd-$(LIBBSD_VERSION).tar.xz
 LIBBSD_SITE = http://libbsd.freedesktop.org/releases
 LIBBSD_LICENSE = BSD-3c MIT
 LIBBSD_LICENSE_FILES = COPYING