build-appliance-image: Don't use COREBASE/LICENSE for checksumming

This file lists the licenses that the OE-Core meta data falls under
but should not be used as a LIC_FILES_CHKSUM, use the MIT license file.

(From OE-Core rev: e12fa3ac08962accb6585e2aa1c486e7852d174d)

Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/images/build-appliance-image_15.0.0.bb

@@ -3,8 +3,7 @@ DESCRIPTION = "An image containing the build system that you can boot and run us
 HOMEPAGE = "http://www.yoctoproject.org/documentation/build-appliance"
 
 LICENSE = "MIT"
-LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=4d92cd373abda3937c2bc47fbc49d690 \
-                    file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
 
 IMAGE_INSTALL = "packagegroup-core-boot packagegroup-core-ssh-openssh packagegroup-self-hosted \
                  kernel-dev kernel-devsrc connman connman-plugin-ethernet dhcp-client \