systemd-compat-units: Add LIC_FILES_CHKSUM for SRC_URI files

We need to have our own LIC_FILES_CHKSUM now as we add the alignment
service.

recipes-fixes/systemd/systemd-compat-units_sysmocom.inc

@@ -7,6 +7,7 @@ S_THISDIR := "${@os.path.dirname(bb.data.getVar('FILE', d, True))}"
 FILESPATH =. "${@base_set_filespath(["${S_THISDIR}/${PN}"], d)}:"
 
 SRC_URI += "file://alignment.service"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
 
 do_install_append() {
 	install -d ${D}${systemd_unitdir}/system/basic.target.wants