sanity: make license QA failures fatal again
Previous work to clean up the license QA code (oe-core
fbdf977) had the side
effect that failing the license sanity check (bad or missing LIC_FILES_CHKSUM)
would emit an error message but wouldn't actually abort the build.
Solve this by changing populate_lic_qa_checksum() so that it tracks if the
message class was in ERROR_QA and if so, aborts the function.
[ YOCTO #10280 ]
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
