Add vendoring for Homebrew

.gitignore

@@ -1 +1,2 @@
 wireguard-go
+vendor

Gopkg.lock

@@ -0,0 +1,42 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/crypto"
+  packages = [
+    "chacha20poly1305",
+    "internal/chacha20",
+    "poly1305",
+    "blake2s",
+    "curve25519"
+  ]
+  revision = "1a580b3eff7814fc9b40602fd35256c63b50f491"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/net"
+  packages = [
+    "bpf",
+    "internal/iana",
+    "internal/socket",
+    "ipv4",
+    "ipv6"
+  ]
+  revision = "2491c5de3490fced2f6cff376127c667efeed857"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/sys"
+  packages = [
+    "cpu",
+    "unix"
+  ]
+  revision = "7c87d13f8e835d2fb3a70a2912c811ed0c1d241b"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "831221f90003ef3b3b4e8277051718f6c8094b04a9cf42ebe02f25e8af866657"
+  solver-name = "gps-cdcl"
+  solver-version = 1

Gopkg.toml

@@ -0,0 +1,15 @@
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/crypto"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/sys"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/net"
+
+[prune]
+  go-tests = true
+  unused-packages = true

Makefile

@@ -5,7 +5,6 @@ BINDIR ?= $(PREFIX)/bin
 all: wireguard-go
 
 wireguard-go: $(wildcard *.go) $(wildcard */*.go)
-	go get -d -v
 	go build -v -o $@
 
 install: wireguard-go