add .gitignore file

Change-Id: Iecd6caa00abf79f58199a8168aa8a1d3f5c9cf0a
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..67d3a67
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*.o
+ccid_host/ccid_functionfs
+ccid_host/cuart_test
+ccid_host/hub_functionfs