Fix travis badge

Signed-off-by: Tom Flynn <tom.flynn@gmail.com>

README.md

@@ -1,7 +1,7 @@
 # opflex
 
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/c933707764264654a804c6b522f0a57e)](https://app.codacy.com/gh/noironetworks/opflex?utm_source=github.com&utm_medium=referral&utm_content=noironetworks/opflex&utm_campaign=Badge_Grade_Dashboard)
-[![Build Status](https://travis-ci.org/noironetworks/opflex.svg?branch=master)](https://travis-ci.org/noironetworks/opflex.svg?branch=master)
+[![Build Status](https://travis-ci.com/noironetworks/opflex.svg?branch=master)](https://travis-ci.com/noironetworks/opflex)
 [![Coverage Status](https://coveralls.io/repos/github/noironetworks/opflex/badge.svg?branch=master)](https://coveralls.io/github/noironetworks/opflex?branch=master)
 [![LGTM alerts](https://img.shields.io/lgtm/alerts/g/noironetworks/opflex.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/noironetworks/opflex/alerts/)
 [![LGTM quality](https://img.shields.io/lgtm/grade/cpp/g/noironetworks/opflex.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/noironetworks/opflex/context:cpp)