Ignore gitlab ci from R

Change-Id: I2e37929393ed107ba4f6011fc338862b1c1ff841
diff --git a/.Rbuildignore b/.Rbuildignore
index 21ae968..ad8d0f1 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -3,3 +3,4 @@
 LICENSE.md
 Readme.md
 Changelog.md
+.gitlab-ci.yml