Add missing dependency generation for assym.h (...the lack of which made testers of art's affinity diff go insane)
Add missing dependency generation for assym.h (...the lack of which
made testers of art's affinity diff go insane)

ok krw@ miod@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars