kmod: bump version

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

package/kmod/kmod.mk

@@ -1,4 +1,4 @@
-KMOD_VERSION = 12
+KMOD_VERSION = 13
 KMOD_SOURCE = kmod-$(KMOD_VERSION).tar.xz
 KMOD_SITE = $(BR2_KERNEL_MIRROR)/linux/utils/kernel/kmod/
 KMOD_INSTALL_STAGING = YES