devhelp: re-add buildlink file. Patch by Dan Cirnat on tech-pkg@.diff -r0 -r1.41 pkgsrc/devel/devhelp/buildlink3.mk
(bsiegert)
# $NetBSD: buildlink3.mk,v 1.41 2020/05/31 19:13:11 bsiegert Exp $
BUILDLINK_TREE+= devhelp
.if !defined(DEVHELP_BUILDLINK3_MK)
DEVHELP_BUILDLINK3_MK:=
BUILDLINK_API_DEPENDS.devhelp+= devhelp>=3.34.0nb3
BUILDLINK_PKGSRCDIR.devhelp?= ../../devel/devhelp
.endif # DEVHELP_BUILDLINK3_MK
BUILDLINK_TREE+= -devhelp