Excluding child repos

Change-Id: I75248ecd5993a462c82a1296cb2edbb09dd2bfe7
diff --git a/.gitignore b/.gitignore
index 815925b..ba1b12c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,9 @@
 # lockfiles for requirements.yaml for dependent charts
 requirements.lock
 
+# child repos (defined in the repo manifest)
+macro/*
+
 # ignore dependent chart dirs
 xos-core/charts
 voltha/charts