Fix build link

Author: rdbatch

README.md

@@ -1,5 +1,5 @@
-# AWS Lambda Runtime - Kotlin/Native 
-![](https://img.shields.io/circleci/project/github/c1phr/lambda-runtime-kotlin-native/master.svg?style=flat)
+# AWS Lambda Runtime - Kotlin/Native
+[ ![](https://img.shields.io/circleci/project/github/c1phr/lambda-runtime-kotlin-native/master.svg?style=flat) ](https://circleci.com/gh/c1phr/lambda-runtime-kotlin-native)
  [ ![Download](https://api.bintray.com/packages/c1phr/com.batchofcode/lambda-runtime-kotlin-native/images/download.svg) ](https://bintray.com/c1phr/com.batchofcode/lambda-runtime-kotlin-native/_latestVersion)
 
 AWS Lambda Runtime for [Kotlin/Native](https://kotlinlang.org/docs/reference/native-overview.html). This provides a way to run Kotlin code in an AWS Lambda serverless context without the JVM, significantly reducing "cold start" time.