Update README.md

Author: Jason Mobarak

README.md

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 # Overview of Swift Toolchains
 
-[![Build Status](https://travis-ci.org/swift-nav/llvm-obfuscator-arm.svg?branch=master)](https://travis-ci.org/swift-nav/llvm-obfuscator-arm)
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 This collection of toolchains includes several things:
 
 - A build of LLVM 6 for ARM and x64 for use within Buildroot to run clang-tidy (and friends)