gen_links.sh.inc: Fix globbing writing '*.ttcn' to */.gitignore

This was the case under ggsn_tests, which in turn prevents search text
tools like "ag" to find stuff in .ttcn files (because it skips code in
.gitignore).

Change-Id: Iaef3cfd5ae29db352046664ab4949b037ca80307
1 file changed