genromfs: add license information

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/genromfs/genromfs.mk

@@ -6,6 +6,8 @@
 
 GENROMFS_VERSION = 0.5.2
 GENROMFS_SITE = http://downloads.sourceforge.net/project/romfs/genromfs/$(GENROMFS_VERSION)
+GENROMFS_LICENSE = GPLv2+
+GENROMFS_LICENSE_FILES = COPYING
 
 define GENROMFS_BUILD_CMDS
  $(TARGET_MAKE_ENV) $(MAKE) -C $(@D) \