add CI badge

README.md

@@ -1,3 +1,5 @@
+[![build status](https://ci.gitlab.com/projects/2142/status.png?ref=master)](https://ci.gitlab.com/projects/2142?ref=master)
+
 procps
 ======
 
@@ -48,4 +50,4 @@ page.
 The email list for the developers and users of procps is found at
 http://www.freelists.org/archive/procps/
 This email list discusses the development of procps and is used by distributions
-to also forward or discuss bugs.
+to also forward or discuss bugs.