The LICENSE is added through the packagegroup bbclass and the checksums
were outdated making the build fail with:
The LIC_FILES_CHKSUM does not match for poky/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58
https://jira.digi.com/browse/DEL-3451
Signed-off-by: Javier Viguera <javier.viguera@digi.com>