README: add OSS-Fuzz/CIFuzz badges

It should make it easier to keep track of what's going on there

Signed-off-by: Evgeny Vereshchagin <evvers@ya.ru>

README.md

@@ -3,6 +3,8 @@ SELinux Userspace
 
 ![SELinux logo](https://github.com/SELinuxProject.png)
 [![Build Status](https://travis-ci.org/SELinuxProject/selinux.svg?branch=master)](https://travis-ci.org/SELinuxProject/selinux)
+[![OSS-Fuzz Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/selinux.svg)](https://oss-fuzz-build-logs.storage.googleapis.com/index.html#selinux)
+[![CIFuzz Status](https://github.com/SELinuxProject/selinux/actions/workflows/cifuzz.yml/badge.svg)](https://github.com/SELinuxProject/selinux/actions/workflows/cifuzz.yml)
 
 Please submit all bug reports and patches to <selinux@vger.kernel.org>.