tests, wcap: update ignores

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
diff --git a/wcap/.gitignore b/wcap/.gitignore
new file mode 100644
index 0000000..67b722d
--- /dev/null
+++ b/wcap/.gitignore
@@ -0,0 +1,3 @@
+wcap-decode
+wcap-snapshot
+