ref: f299607704902a96ed91fbcc4f29af1f645c37bb
dir: /test/asm/empty-data-directive.err/
warning: empty-data-directive.asm(6): [-Wempty-data-directive]
DB directive without data in ROM
warning: empty-data-directive.asm(7): [-Wempty-data-directive]
DW directive without data in ROM
warning: empty-data-directive.asm(8): [-Wempty-data-directive]
DL directive without data in ROM