trivial: Add .licenseignore file

.licenseignore

diff --git a/.licenseignore b/.licenseignore
new file mode 100644
index 0000000..f678ea7
--- /dev/null
+++ b/.licenseignore
@@ -0,0 +1,6 @@
+*LICENSE_BSD2.txt
+*LICENSE_GPLv2.txt
+LICENSE.txt
+.licenseignore
+.gitignore
+.git/*