Add OpenBSD support to libmachine/crashreport

Signed-off-by: Ivan Markin <sw@nogoegst.net>

libmachine/crashreport/os_openbsd.go

@@ -0,0 +1,12 @@
+package crashreport
+
+import "os/exec"
+
+func localOSVersion() string {
+	command := exec.Command("uname", "-r")
+	output, err := command.Output()
+	if err != nil {
+		return ""
+	}
+	return string(output)
+}