Trying to make the status badges consistent

README.md

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 OpenMW
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-[![Build Status](https://travis-ci.org/OpenMW/openmw.svg?branch=coverity_scan)](https://travis-ci.org/OpenMW/openmw)
+[![Build Status](https://img.shields.io/travis/OpenMW/openmw.svg)](https://travis-ci.org/OpenMW/openmw) [![Coverity Scan Build Status](https://scan.coverity.com/projects/3740/badge.svg)](https://scan.coverity.com/projects/3740)
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-[![Coverity Scan Build Status](https://scan.coverity.com/projects/3740/badge.svg)](https://scan.coverity.com/projects/3740)
 
 OpenMW is an attempt at recreating the engine for the popular role-playing game
 Morrowind by Bethesda Softworks. You need to own and install the original game for OpenMW to work.