wsapi-fcgi: add LICENSE_FILES

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/wsapi-fcgi/wsapi-fcgi.mk

@@ -9,5 +9,6 @@ WSAPI_FCGI_VERSION = $(WSAPI_FCGI_VERSION_MAJOR)-1
 WSAPI_FCGI_SUBDIR = wsapi-$(WSAPI_FCGI_VERSION_MAJOR)
 WSAPI_FCGI_DEPENDENCIES = libfcgi
 WSAPI_FCGI_LICENSE = MIT
+WSAPI_FCGI_LICENSE_FILES = $(WSAPI_FCGI_SUBDIR)/doc/us/license.html
 
 $(eval $(luarocks-package))