[master] fe83bc4a8 Make lgtm extraction happy

[Federico G. Schwindt]

commit fe83bc4a8b418995b565d99d8c987c32c386b3bb
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Wed Apr 10 20:00:06 2019 +0100

    Make lgtm extraction happy

diff --git a/.lgtm.yml b/.lgtm.yml
new file mode 100644
index 000000000..578bfad28
--- /dev/null
+++ b/.lgtm.yml
@@ -0,0 +1,4 @@
+extraction:
+  cpp:
+    prepare:
+      packages: "python3.7"