Include runtime.GOOS and runtime.GOARCH in -version output

Makefile

@@ -0,0 +1,10 @@
+COMMIT=$(shell git rev-parse HEAD)
+VERSION=$(shell git describe --tags --exact-match --always)
+DATE=$(shell date +'%FT%TZ%z')
+
+vegeta: vendor
+	go build -v -a -tags=netgo \
+  	-ldflags '-s -w -extldflags "-static" -X main.Version=$(VERSION) -X main.Commit=$(COMMIT) -X main.Date=$(DATE)'
+
+vendor:
+	dep ensure -v

main.go

@@ -36,7 +36,14 @@ func main() {
 	fs.Parse(os.Args[1:])
 
 	if *version {
-		fmt.Printf("Version: %s\nCommit: %s\nGo version: %s\nDate: %s\n", Version, Commit, runtime.Version(), Date)
+		fmt.Printf("Version: %s\nCommit: %s\nRuntime: %s %s/%s\nDate: %s\n",
+			Version,
+			Commit,
+			runtime.Version(),
+			runtime.GOOS,
+			runtime.GOARCH,
+			Date,
+		)
 		return
 	}