update .gitignore

Change-Id: Ic21be2c020e9a8a09fa6c3d2cf7d4d20660b93a1
diff --git a/.gitignore b/.gitignore
index 7e0c95a..7d44471 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 build/
 lib/
 bin/
+CMakeFiles/
 .*~
 .*\.log
 .*LOG