Add Coveralls (test coverage status) badge to README

diff --git a/README.md b/README.md
index 593ba4534304f691fa606d72717af19c0da659ce..54bd9f713ba3ce235beae19c4b15b140df2ea708 100644 (file)
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ IN NEW CODE, PLEASE USE C11 OR C++14 STANDARD ATOMICS INSTEAD OF THIS PACKAGE.
 
 [![Travis-CI build status](https://travis-ci.org/ivmai/libatomic_ops.svg?branch=master)](https://travis-ci.org/ivmai/libatomic_ops)
 [![AppVeyor CI build status](https://ci.appveyor.com/api/projects/status/github/ivmai/libatomic_ops?branch=master&svg=true)](https://ci.appveyor.com/project/ivmai/libatomic-ops)
+[![Coveralls test coverage status](https://coveralls.io/repos/ivmai/libatomic_ops/badge.png?branch=master)](https://coveralls.io/github/ivmai/libatomic_ops)
 
 This is version 7.5.0 (next release development) of libatomic_ops.