package/python-pysnmp-apps: fix LICENSE_FILES

Fixes
http://autobuild.buildroot.net/results/4dd/4dd3a5c0654179a43b2efba54b5ac3094592d0d3/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-pysnmp-apps/python-pysnmp-apps.mk

@@ -9,7 +9,7 @@ PYTHON_PYSNMP_APPS_SOURCE = pysnmp-apps-$(PYTHON_PYSNMP_APPS_VERSION).tar.gz
 PYTHON_PYSNMP_APPS_SITE = https://pypi.python.org/packages/source/p/pysnmp-apps
 PYTHON_PYSNMP_APPS_SETUP_TYPE = setuptools
 PYTHON_PYSNMP_APPS_LICENSE = BSD-3c
-PYTHON_PYSNMP_APPS_LICENSE_FILES = LICENSE
+PYTHON_PYSNMP_APPS_LICENSE_FILES = LICENSE.txt
 
 PYTHON_PYSNMP_APPS_DEPENDENCIES = python-pysnmp