Ignore .buckd folder

Change-Id: I9acf1fd97a95793816b35cebf9f7d94941e3b381

.gitignore

diff --git a/.gitignore b/.gitignore
index 46def34..d7fe8e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 bucklets
 eclipse-out
 target/
+.buckd/
 .buckversion
 .classpath
 .project