kern/51907: amd64 bpfjit npf xen bug

[amonk%backwatcher.com@localhost]

>Number:         51907
>Category:       kern
>Synopsis:       amd64 bpfjit npf xen bug
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 23 00:10:00 +0000 2017
>Originator:     Kyle Amon
>Release:        7.0.2
>Organization:
BackWatcher, Inc.
>Environment:
NetBSD nbsd.backwatcher.com 7.0.2_PATCH NetBSD 7.0.2_PATCH (XEN3_DOM0) amd64
>Description:
The XEN3_DOM0 (and, presumably the XEN3_DOMU, but I didn't get past the _DOM0 because of this), kernel will not build with 'options BPFJIT' on amd64.  One gets this...

One gets this...

/usr/src/sys/net/bpfjit.c:72:22: fatal error: sljitLir.h: No such file or directory                                                                              #include <sljitLir.h>                                                                                ^                                                         compilation terminated.                                                         --- bpfjit.o ---                                                                *** [bpfjit.o] Error code 1
>How-To-Repeat:
Try to build a XEN_DOM0 kernel with npf and bpfjit on amd64 7.0.2.
>Fix:
The same thing was evidently already fixed for i386.  See...

https://mail-index.netbsd.org/tech-net/2016/09/14/msg006102.html

And it's result...

http://releng.netbsd.org/cgi-bin/req-7.cgi?show=1255

Please do the same fix and pullup for amd64.