sysutils/node_exporter: fix meminfo collector

meminfo collector failed with:

node_exporter[29302]: ts=2023-02-04T09:06:27.328Z caller=collector.go:169
level=error msg="collector failed" name=meminfo duration_seconds=0.000127617
err="couldn't get memory: cannot allocate memory"

This patch contains a fix for the meminfo collector, it has also been submitted
upstream.

PR:		269154
Reported by:	David O'Rourke <dor.bsd@xm0.uk>

sysutils/node_exporter/Makefile

@@ -1,6 +1,7 @@
 PORTNAME=	node_exporter
 PORTVERSION=	1.5.0
 DISTVERSIONPREFIX=v
+PORTREVISION=	1
 CATEGORIES=	sysutils
 
 MAINTAINER=	dor.bsd@xm0.uk

sysutils/node_exporter/files/patch-collector_memory__bsd.go

@@ -0,0 +1,10 @@
+--- collector/memory_bsd.go.orig	2023-02-03 16:38:43 UTC
++++ collector/memory_bsd.go
+@@ -87,6 +87,7 @@ func NewMemoryCollector(logger log.Logger) (Collector,
+ 				description: "Locked in memory by user, mlock, etc",
+ 				mib:         "vm.stats.vm.v_user_wire_count",
+ 				conversion:  fromPage,
++				dataType:    bsdSysctlTypeCLong,
+ 			},
+ 			{
+ 				name:        "cache_bytes",