Explain the badges.

README.md

@@ -1,9 +1,9 @@
 GNUstep Objective-C Runtime
 ===========================
 
-[![Build Status](https://dev.azure.com/gnustep/libobjc2/_apis/build/status/gnustep.libobjc2?branchName=master)](https://dev.azure.com/gnustep/libobjc2/_build/latest?definitionId=1&branchName=master)
+Linux and Windows CI: [![Build Status](https://dev.azure.com/gnustep/libobjc2/_apis/build/status/gnustep.libobjc2?branchName=master)](https://dev.azure.com/gnustep/libobjc2/_build/latest?definitionId=1&branchName=master)
 
-[![Build Status](https://api.cirrus-ci.com/github/gnustep/libobjc2.svg)](https://cirrus-ci.com/github/gnustep/libobjc2)
+FreeBSD CI: [![Build Status](https://api.cirrus-ci.com/github/gnustep/libobjc2.svg)](https://cirrus-ci.com/github/gnustep/libobjc2)
 
 The GNUstep Objective-C runtime was designed as a drop-in replacement for the
 GCC runtime.  It supports three ABIs: