xsrc/53337: Missing xcb headers

[coypu%sdf.org@localhost]

>Number:         53337
>Category:       xsrc
>Synopsis:       Missing xcb headers
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    xsrc-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jun 01 17:30:00 +0000 2018
>Originator:     coypu
>Release:        NetBSD localhost 8.99.17 NetBSD 8.99.17 (GENERIC) #11: Thu May 17 14:27:06 IDT 2018  fly@localhost:/home/fly/obj/sys/arch/amd64/compile/GENERIC amd64
>Organization:
>Environment:
NetBSD localhost 8.99.17 NetBSD 8.99.17 (GENERIC) #11: Thu May 17 14:27:06 IDT 2018  fly@localhost:/home/fly/obj/sys/arch/amd64/compile/GENERIC amd64

>Description:
This header seems to be missing, and breaking building pkgsrc mesa with base xorg and dri option (I have some diffs to get this far)

/usr/X11R7/include/xcb/dri3.h
there's a few more (ge.h, etc.) but I can't seem to find a way to generate them.
>How-To-Repeat:

>Fix: