README: add the lgtm.com badge

Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/README.md b/README.md
index e8223fb..4e71198 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ https://github.com/seccomp/libseccomp
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/608/badge)](https://bestpractices.coreinfrastructure.org/projects/608)
 [![Build Status](https://img.shields.io/travis/seccomp/libseccomp/master.svg)](https://travis-ci.org/seccomp/libseccomp)
 [![Coverage Status](https://img.shields.io/coveralls/github/seccomp/libseccomp/master.svg)](https://coveralls.io/github/seccomp/libseccomp?branch=master)
+[![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/seccomp/libseccomp.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/seccomp/libseccomp/context:cpp)
 
 The libseccomp library provides an easy to use, platform independent, interface
 to the Linux Kernel's syscall filtering mechanism.  The libseccomp API is