package/intel-mediasdk: fix license

Fixes:
 - http://autobuild.buildroot.org/results/5730991fded5ab3474cd0325b399f6f27972ca81

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/intel-mediasdk/intel-mediasdk.mk

@@ -7,7 +7,7 @@
 INTEL_MEDIASDK_VERSION = 18.4.0
 INTEL_MEDIASDK_SITE = http://github.com/Intel-Media-SDK/MediaSDK/archive
 INTEL_MEDIASDK_LICENSE = MIT
-INTEL_MEDIASDK_LICENSE_FILES = COPYING
+INTEL_MEDIASDK_LICENSE_FILES = LICENSE
 
 INTEL_MEDIASDK_INSTALL_STAGING = YES
 INTEL_MEDIASDK_DEPENDENCIES = intel-mediadriver