Add auto-generated files to .gitignore

Change-Id: Iddaadfdc491d176cfda346b3ba95cf9db492e1e8
Test: presubmit
diff --git a/.gitignore b/.gitignore
index 1869683..d5c75d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,8 @@
 __pycache__/
 *.py[co]
 *$py.class
+*.dll
+*.exe
 
 # Distribution / packaging
 .Python
@@ -21,6 +23,8 @@
 .installed.cfg
 *.egg
 MANIFEST
+Lib/site-packages/
+
 
 # PyInstaller
 #  Usually these files are written by a python script from a template