python-rpi-gpio: fix typo

s/LICENSE.txt/LICENCE.txt

Fixes:
http://autobuild.buildroot.net/results/406/4060be5aed299b9fc197f2f8c398ca2800e7ec08/

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python-rpi-gpio/python-rpi-gpio.mk

@@ -8,7 +8,7 @@ PYTHON_RPI_GPIO_VERSION = 0.6.1
 PYTHON_RPI_GPIO_SOURCE = RPi.GPIO-$(PYTHON_RPI_GPIO_VERSION).tar.gz
 PYTHON_RPI_GPIO_SITE = http://sourceforge.net/projects/raspberry-gpio-python/files
 PYTHON_RPI_GPIO_LICENSE = MIT
-PYTHON_RPI_GPIO_LICENSE_FILES = LICENSE.txt
+PYTHON_RPI_GPIO_LICENSE_FILES = LICENCE.txt
 PYTHON_RPI_GPIO_SETUP_TYPE = distutils
 
 $(eval $(python-package))