Update README.md

Author: dsyme

README.md

@@ -17,7 +17,7 @@ For more information about the project, see:
 Build Status
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-Head (branch ``master``), Mono 3.x, OSX + unit tests (Travis) [![Build Status](https://travis-ci.org/fsharp/FSharp.Compiler.Service.png?branch=master)](https://travis-ci.org/fsharp/FSharp.Compiler.Service/branches)
+Head (branch ``master``), Mono, Linux/OSX + unit tests (Travis) [![Build Status](https://travis-ci.org/fsharp/FSharp.Compiler.Service.png?branch=master)](https://travis-ci.org/fsharp/FSharp.Compiler.Service/branches)
 
 Head (branch ``master``), Windows Server 2012 R2 + unit tests (AppVeyor)  [![Build status](https://ci.appveyor.com/api/projects/status/3yllu2qh19brk61d?svg=true)](https://ci.appveyor.com/project/fsgit/fsharp-compiler-service)