[administrivia] Update gitignore files

- Add more stuff, archive libraries, etc..
diff --git a/ripngd/.gitignore b/ripngd/.gitignore
index dc57967..e871fae 100644
--- a/ripngd/.gitignore
+++ b/ripngd/.gitignore
@@ -14,4 +14,4 @@
 .arch-ids
 *~
 *.loT
-
+*.a