Reintroduce the necessary vendor bits for per-node IDs

[sean-]

This PR is an extension of #2691

Added:

• shirou/gopsutil with Add native struct support for FreeBSD/arm. shirou/gopsutil#309
• shirou/w32

$ make bin
[snip]
==> Building...
Number of parallel builds: 7

-->   windows/amd64: github.com/hashicorp/consul
-->     linux/amd64: github.com/hashicorp/consul
-->   freebsd/amd64: github.com/hashicorp/consul
-->       linux/arm: github.com/hashicorp/consul
-->      darwin/386: github.com/hashicorp/consul
-->     windows/386: github.com/hashicorp/consul
-->   solaris/amd64: github.com/hashicorp/consul
-->    darwin/amd64: github.com/hashicorp/consul
-->     freebsd/386: github.com/hashicorp/consul
-->     freebsd/arm: github.com/hashicorp/consul
-->       linux/386: github.com/hashicorp/consul
==> Packaging...
--> darwin_386
  adding: consul (deflated 72%)
--> darwin_amd64
  adding: consul (deflated 75%)
--> freebsd_386
  adding: consul (deflated 72%)
--> freebsd_amd64
  adding: consul (deflated 75%)
--> freebsd_arm
  adding: consul (deflated 73%)
--> linux_386
  adding: consul (deflated 72%)
--> linux_amd64
  adding: consul (deflated 75%)
--> linux_arm
  adding: consul (deflated 73%)
--> solaris_amd64
  adding: consul (deflated 75%)
--> windows_386
  adding: consul.exe (deflated 73%)
--> windows_amd64
  adding: consul.exe (deflated 75%)

==> Results:
total 67024
-rwxr-xr-x  1 sean  staff    33M Feb  1 08:41 consul

[slackpad]

Looks good - thanks for chasing that down. I'll fork this and re-add the agent side and submit it in one go.