Add a .gitignore file

This will prevent .pyc from ever being committed.

Bug: None
Test: git status
Change-Id: Ic4192077f8f74a201842d8ea19eba4fc9856de48
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0d20b64
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.pyc