pkg: Build pkg/machine on FreeBSD

Add missing symbols for freebsd and freebsd/amd64.

[NO NEW TESTS NEEDED]

Signed-off-by: Doug Rabson <dfr@rabson.org>

pkg/machine/ignition_freebsd.go

@@ -0,0 +1,8 @@
+//go:build freebsd
+// +build freebsd
+
+package machine
+
+func getLocalTimeZone() (string, error) {
+	return "", nil
+}

pkg/machine/qemu/options_freebsd.go

@@ -0,0 +1,13 @@
+package qemu
+
+import (
+	"os"
+)
+
+func getRuntimeDir() (string, error) {
+	tmpDir, ok := os.LookupEnv("TMPDIR")
+	if !ok {
+		tmpDir = "/tmp"
+	}
+	return tmpDir, nil
+}

pkg/machine/qemu/options_freebsd_amd64.go

@@ -0,0 +1,18 @@
+package qemu
+
+var (
+	QemuCommand = "qemu-system-x86_64"
+)
+
+func (v *MachineVM) addArchOptions() []string {
+	opts := []string{"-machine", "q35,accel=hvf:tcg", "-cpu", "host"}
+	return opts
+}
+
+func (v *MachineVM) prepare() error {
+	return nil
+}
+
+func (v *MachineVM) archRemovalFiles() []string {
+	return []string{}
+}