Add .gitignore file

Change-Id: I4ff2bed7bfd1283015af0d31e62612009f4f44e8
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7792e06
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+bin/
+gen/