Add .buckd to .gitignore

Change-Id: I8d683634d33946ab778034f12dbf5361f3c8d178

.gitignore

diff --git a/.gitignore b/.gitignore
index 7f7fd4b..c27e17f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+/.buckd/
 /.buckversion
 /.classpath
 /.project